Proceedings of the United States National Museum

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PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM

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SMITHSONIAN INSTITUTION U. S. NATIONAL MUSEUM

Vol. 105 Washington : 1956 No. 3361

MARINE POLYCIIAETE WORMS FROM LABRADOR

By Marian H. Pettibone ^

This report on the polychaete fauna of Labrador is based on material collected by the Blue Dolphin Expeditions to Labrador and Newfoundland in 1949, 1950, 1951, and 1952 under the command of David C Nutt. The collections were made between 51° and 60° north latitude, in the intertidal zone and in depths of from 4 to 125 fathoms, on bottoms of silt, mud, sand, rubble, pebbles, stones, and rocks, together with detritus, shells, corals, bryozoans, algae, worm tubes, and various combinations of these. The collections are deposited in the U. S. National Museum. Additional records for some of the Labrador species are cited from other collections in that museum. This paper supplements to some extent the report on the polychaetes of Point Barrow, Alaska (Pettibone, 1954). Of the 68 species in the Labrador collections, 45 were found at Point Barrow. In the systematic portion below, only those hterature references not mentioned in the earlier paper are cited ; more'complete synonymies for the species common to both regions will bo found in the Point Barrow report.

I Department of Zoology, University of New Hatupshire, Durhaia, N. H.

366148—56 1 581 532 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loe

The polychaete fauna of Labrador is known only from a few scattered records. The most extensive single paper is the report by J. Percy Moore (1909b) on a collection of polychaetes dredged in 1908 by Owen Bryant off the coasts of Labrador, Newfoundland, and Nova Scotia; 38 of the 51 species mentioned in that report were found on the Labrador coast. Most of the collection was deposited in the National Museum and is referred to below. The Blue Dolphin collections nearly double the number of polychaete species known from Labrador. The writer acknowledges her appreciation to the authorities of the Smithsonian Institution for allowing her to make use of the facilities of the National Museum, and especially to Dr. Waldo L. Schmitt and Dr. Fenner A. Chace, Jr., of the Department of Zoology staff there. Special thanks are also due to Mr. David C. Nutt of the Dartmouth College Museum for his helpful suggestions and assistance. List of Stations

The locations of the polychaete stations are shown in figure 1. They are listed below with temperatures (estimated yearly range in parentheses) and salinities, all of which were furnished by D. C. Nutt. The species found at each station are listed, with the number of specimens indicated in parentheses.

1. Strait of Belle Isle, 51°26.5' N., 56°52' W., 40 fms., June 27, 1949; 0.8° C. (-1.5 to 3.0), 327oo.

Harmothoe cxtenuala (Grube) (5) Nereis pelagica Linne (3) Eusyllis blomstrandi Malmgren (9) Spirorbis spirillum (Linne) C5)

2. Strait of Belle Isle, 51°41.5' N., 56°20' W., 25 fms., coral and

rock, July 1, 1949; -0.43° C? (-1.6 to 1.0), 32°/oo.

Eunoe oerstedi Malmgren (1) Eusyllis blomstrandi MalmgTen (6) Harmothoe imbricata (Linn6) (1) Nereis pelagica Linn6 ''4)

Harmothoe extenuata (Grube) (5) Noihria conchylega (Sars) (1) Autolytus fallax Malmgren (1) Thelepus cincinnatus (Fabricius) Sphaerosyllis erinaceus Claparfede (1) (1)

3. Strait of Belle Isle, 51°39.7' N., 55°57.7' W., 30 fms., rock,

July 1, 1949; 0.0° C. (-1.0 to 12), 32°/oo.

Thelepus cincinnalus (Fabricius) (1)

4. Strait of Belle Isle, 51°39.7' N., 56°08' W., 40 fms., rubble, July 1, 1949; -0.8° C. (-1.6 to 1.0?), 32.3%o.

Eunoe nodosa (Sars) (2) Harmothoe extenuata (Grube) (1) Eunoe oerstedi Malmgren (1)

of the Bliu Dolphin Figure I.—Coast! of Labrador «nd Newfoundland ihowing the location* of the polychaete stations 67-79). Ubrador Expeditions of 1949 (Stations 1-27). 1950 (Sutions 28-48), 1951 (Stations 49-66). and 1952 (Stations (Prepared by D. C. Nutt.) leeus—M (Faoep. RS)

POLYCHAETE WORMS—PETTIBONE 533

5. St. Lewis Inlet, 52°20.1' N., 55°49.4' W., 40 fms., mud, July 12, 1949; -1.2° C. (-1.6 to ?), 32.6l7oo.

Arcteobia anttcostiensis (Mcln- Pectinaria hyperborea (Malmgren) tosh) (1) (8) Prionospio tnalmgreni Claparfede

(1)

6. St. Lewis Inlet, 52°22.3' N., 55°56.7' W., 35 fms., soft mud, July 12, 1949; -1.34° C. (-1.6 to ?), 32.4°/oo.

Harmothoe ertenuata (Grube) (1)

7. Kaipokok Inlet, 54°56.7' N., 59°43.2' W., 45 fms., silt, July 29, 1949; -1.8° C. (-1.8 to -1.6), 32.6°/oo.

Antinoe badia (Th6el) (5) Nephtys ciliata (MuUer) (2) Harmothoe extenuata (Grube) (4) Polycirrus medusa Grube (1) Gattyana cirrosa (Pallas) (2) Branchiomma infarcla (Kroyer) Castalia aphrodiioides (Fabricius) (5)

(1)

8. Kaipokok Inlet, 55°01.5' N., 59°33.3' W., 45 fms., silt, July 29, 1949; -1.85° C. (-1.8 to -1.6), 32.9%o.

Castalia aphrodiioides (Fabricius) (1)

9. Kaipokok Inlet, 54°52.4' N., 59°50.3' W., 15 fms., silt, July 29, 1949; -1.1° C. (-1.8 to 0.0), 30.68%o.

Harmothoe extenuata (Grube) (1) Gattyana cirrosa (Pallas) (2)

10. Hebron Fjord, 58°14.8' N., 62°29.6' W., 60 fms., fine sandy mud, some rock, Aug. 7, 1949; -1.0° C. (-1.8 to 0.0), 32.5°/oo.

Gattyana cirrosa (Pallas) (3) Ampharete arctica Malmgren (1) Gattyana amondseni (Malmgren) Pista flexuosa (Grube) (3)

(1) Terebellides stroemii Sars (1) Pectinaria hyperborea (Malmgren)

(7)

11. Hebron Fjord, 58°11.4' N., 62°34.2' W., 95 fms., mud, Aug. 8, 1949; -1.8° C. (-1.8 to -1.8), 33°/oo.

Antinoe badia (Th^el) (2) Chaetozone setosa Malmgren (16) Eunoe nodosa (Sars) (1) Brada inhabilis (Rathke) (1) Arcteobia anticostiensis (Mcln- Brada granosa Stimpson (13)

tosh) (6) Pectinaria hyperborea (Malmgren) Gattyana cirrosa (Pallas) (36) (186) Gattyana amondseni (Malmgren) Sabellides borealis Sars (1)

(1) Pista flexuosa (Grube) (15) Nephtys ciliata (MuUer) (2) Pista maculala (Dalyell) (1) Cirratulus cirratus (Muller) (1) Euchone papillosa (Sars) (4)

12. Hebron Fjord, 58°09' N., 62°45.7' W., 125 fms., mud, Aug. 8, 1949; -1.85° C. (-1.8 to -1.8), 33.1°/oo. 534 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 105

Gattyana cirrosa (Pallas) (16) Sabellides borealis Sars (9) Chaetozone setosa Malmgren (30) Pista flexuosa (Grube) (4) Nicomache lumbricalis (Fabricius) Pista maculata (Dalyell) ''20) (3) Potamilla neglecta (Sars) (1) Pectinaria hyperborea (Malmgren) Euchone papillosa (Sars) (10) (62)

13. Hebron Fjord, 58°08.6' N., 62°55.6' W., 90 fms., mud, Aug. 11, 1949; -1.8° C. (-1.8 to -1.7), 33.12°/oo.

Pectinaria hyperborea (Malmgren) (5)

14. Hebron Fjord, 58°05.6' N., 63°03.9' W., 50 fms., mud, some rock, Aug. 12, 1949; —1.7° C. (-1.8 to -1.6), 32.55°/oo.

Harmothoe extenuata (Grube) Nicomache lumbricalis (Fabricius)

(2) (1) Arcteobia anticostiensis (Mcln- Pectinaria hyperborea (Malmgren)

tosh) (1) (10) Gattyana cirrosa (PaUas) (2) Pista maculata (Dalyell) (1)

15. Strait of Belle Isle, Forteau Bay, 51°28' N., 56°54' W., 15-20 fms., sand, June 26, 1949; 2° C. (-1.0 to 6.0), 31.33°/oo.

Travisia forbesii Johnston (2) Ophelia limacina (Rathke) (2)

16. St. Lewis Inlet, Indian Island, Assizes Run, 52°15' N., 55°04' W., 8 fms., sand and rock, July 11, 1949; 4° C. (—1.6 to 6.0), 29°/oo.

Harmothoe extenuata (Grube) (4) Nereis pelagica Linn6 (1)

17. Strait of Belle Isle, Red Bay, 51°44' N., 56°25' W., 8 fms., soft mud, June 30, 1949; 2° C. (-1.6 to 6.0), 31%o.

Nephtys ciliata (Miiller) (4) Ampharete acutifrons Grube (1) Pherusa plumosa (Miiller) (4) Lysippe labiala Malmgren (1) Praxillella praetermissa (Malm- Samytha sexcirrata (Sars) (3)

gren) (2) TerebelUdes stroemii Sars (2) Pectinaria hyperborea (Malmgren) Chone duneri Malmgren (2)

(4)

18. Hebron Fjord, Soak Point, 58°11' N., 63°01' W., 13 fms., rock, pebbles, sand, Aug. 31, 1949; 1.0° C. (-1.8 to 3.0), 31°/oo.

Gattyana cirrosa (Pallas) (2) Lumbrineris fragilis (Miiller) (3) Nephtys ciliata (Miiller) (4) Pherusa plumosa (Miiller) (1)

19. Kaipokok Fjord, 54°56' N., 59°38' W., 45 fms., silt, Aug. 1, 1949; -1.8° C. (-1.8 to -1.6), 32.9°/oo.

Melaenis lovSni Malmgren (1)

20. Davis Inlet, 55°51' N., 60°48' W., 12 fms., rubble, Aug. 3, 1949; 4.0° C. (-1.8 to 6.0), 30°/oo.

Harmothoe extenuata (Grube) (1) Pectinaria granulata (Linn6) (2) Nephtys ciliata (Miiller) (2) Thelepus cincinnatus (Fabricius) Flabelligera affinis Sars (1) (3) POLYCHAETE WORMS—PETTIBONE 535

21. St. Lewis Inlet, Assizes Harbor, 52°15' N., 55°04' W., 6 fms., muddy sand and coral, July 15, 1949; 4.5° C. (—1.6 to 6.0), 2q°/«o

Harmothoe extenuata (Grube) (1)

22. Strait of Belle Isle, 2 miles off Anse au Loup, 51°36' N., 56°38' W., 30-40 fms., June 29, 1949; -0.5° C. (-1.2 to 2.0), 32%o.

Harmothoe extenuaia (Grube) (1) Eusyllis blomstrandi Malmgven (2)

Autolytus alexandri Malmgren (1) Nei-eis pelagica Linne (3)

23. Hamilton Inlet, Cartwight Harbor, 53°43' N., 57°02' W., 6 fms., sand, mud, rock, much detritus, July 19, 1949; 9° C. (—1.6 to 10), 26°/oo.

Harmothoe imbricaia (Linne) (1) Melinna cristata (Sars) (1) Lumhrineris fragilis (Miiller) (2) Tcrehellides stroemii Sars (1) Praxillella praeiermissa (Malm- Sabella crassicornis Sars (1) gren) (3)

24. Hamilton Inlet, Indian Harbor, 54°27' N., 57°11' W., 6 fms., mudd}^ sandy, July 25, 1949; 6° C. (-1.8 to 8), 3l7oo.

Harmothoe imbricata (Linne) (1) Nephtys ciliata (Miiller) (1) Pholoe minuta (Fabricius) (4) Capiiella capitata (Fabricius) (4)

25. Strait of Belle Isle, Centre Bank, 51^31' N., 56°35' W., 25-30 fms., small rocks, pebbles, June 29, 1949; —0.5° C. (—1.6 to 6.0),

Harmothoe extenuata (Grube) (1)

26. Strait of Belle Isle, 3 miles off Red Bay, 30 fms., June 29, 1949; -0.5° C. (-1.6 to 1.0), 32°/oo.

Harmothoe extenuata (Grube) (1) Eusyllis blomslrandi Malmgren (3)

27. Hamilton Inlet, Trunmore Bay, 8 fms., sandy, July 25, 1949; 6° C. (-1.8 to 10), 30°/oo.

Nephtys longosetosa Oersted (14) Pedinaria hyperborea (Malmgren) (1)

28. Lake Melville, 53°52' N., 59°19' W., 30-35 fms., mud, July 11, 1950; -0.2° C. (-0.3 to 0.3), 27°/oo.

Antinoe badia (Th^el) (1) Branchiomma infarda (Kroyer) Scalibregma inflatum Rathke (2) (2)

29. Lake Melville, 54°01.3' N., 58°41.7' W., 70 fms., mud, July 13, 1950; -0.9° C. (-0.1 to -0.9), 28.5°/oo.

Antinoe badia (Theel) (3) Nereis zonata Malmgren (11) Phyllodoce groenlandica Oersted Aglaophamus malmgreni (Thdel)

(1) (1) _ Paranaitis kosteriensis (Malm- gren) (1) PROCEEDINGS OF THE NATIONAL MUSEUM vol. 105

30. Seven Islands Bay, 59°23.4' N., 64°03.2' W., 10-12 fms., stony, some mud, Aug. 10, 1950; 1.0° (-1.8 to 2.0), 31.67oo.

Antinoe badia (Th^el) (1) Flabelligera affinis Sars (1) Eunoe nodosa (Sars) (1) Spiroibis spirillum (Linn6) (3) Harmothoe imbricata (Linn6) (3)

31. Seven Islands Bay, Kangalaksiorvik Fjord, 59°24' N., 64°01' W., 30 fms., mud, some rock, Aug. 8, 1950; -0.5° C. (-1.8 to 0.0),

32 /oo-

Eunoe oerstedi Malmgren (1) Sabellides borealis Sars (1) Harmothoe extenuata (Grube) (9) Pista maculata (Dalyell) (8) Gattyana cirrosa (Pallas) (3) Leaena abranchiata Malmgren (1) Flabelligera affinis Sars (2) Euchone analis (Kroyer) (4) Maldane sarsi Malmgren (2) Spirorbis granulatus (Linn6) (1) Nicomache lumbricalis (Fabriciust Spirorbis spirillum (Linn^) (1)

(2) Pectinaria hyperborea (Malmgren)

(2)

32. Lake Melville, off Lowland Point, 53°50' N., 59°25' W., 20 fms., sand, mud, rock, July 25, 1950; 0.0° C. (0.0 to 1.0), 26°/oo.

Branchiomma infarcta (Kroyer) (1)

33. Seven Islands Bay, 59°24' N., 63°5r W., 50 fms., mud, some rock, Aug. 8, 1950; -1.3° C. (-1.8 to -1.0), 32.5°/oo.

AntinoS badia (Th^el) (2) Pectinaria hyperborea (Malmgren) Eunoe nodosa (Sars) (1) (4) Harmothoe imbricata (Linne) (1) Pista flexuosa (Grube) (5) Harmothoe extenuata (Grube) (1)

34. Lake MelvUle, off St. Johns Island, 53°56.5' N., 58°58' W., 35 fms., mud, July 23, 1950; -0.5° C. (-0.5 to 0.2), 27.7°/oo.

Nereis zonata Malmgren (I) Spirorbis granulatus (Linn6) (1)

35. Lake Melville, 53°56' N., 59°03' W., 45 fms., mud, July 12, 1950; -0.6° C. (-0.6 to 0.2), 27.8°/oo.

Branchiomma infarcta (Kroyer) (2)

36. Lake Melville, 53°56' N., 59°03' W., 65-100 fms., sandy mud, some rock, July 14, 1950; -0.8° C. (-1.2 to -0.2), 28.85°/oo.

Harmothoe extenuata (Grube) (1) Ephesia gracilis Rathke (1) Nereis zonata Malmgren (1)

37. Lake Melville, west end, 53°32.2' N., 60°03' W., 55 fms., mud, July 8, 1950; -0.5° C. (-0.5 to -0.1), 27.9°/oo.

Nicomache lumbricalis (Fabricius) Leaena abranchiata Malmgren (1)

(1)

38. Lake Melville, west end, 53°28.8' N., 59°59.5' W., 15 fms., mud, Aug. 19, 1950; 1.0° C. (0.5 to 2.0), 25°/oo. POLYCHAETE WORMS—PETTIBONE 537

Antinoe sarsi Kinberg (1) Pista maculata (Dalyell) (40) Nereis zonata Malmgren (1) Leaena abranchiaia Malmgren (12) Pista flexuosa (Grube) (3) Terebellides slroemii Sars (1)

39. Lake Melville, west end, 53°32' N., 60°03' W., 57 fms., mud, Aug. 19, 1950; -0.5° C. (-0.5 to -0.1), 27.97oo.

Antinoe badia (Th6el) (2) Pista maculata (Dalyell) (1) Aglaophamus malmgreni (Th^el) Branchiomma infarcta (Kroyer)

(8) (3)

40. Greater Lake Melville area, Goose Bay, 53°2r N., 60°05' W., 30

fms., mud, July 7, 1950; 0.8° C. (0.8 to 1.5), 22.4°/oo.

Antinoe badia (Th^el) (1) Branchiomma infarcta (Kroyer) Nereis zonata Malmgren (5) (6) Pista maculata CDalyell) (6)

41. Seven Islands Bay, 59°25' N., 63°47' W., 50 fms., stony, Aug. 10, 1950; -1.3° C. (-1.8 to -1.0), 32.7°/oo.

Pectinaria hyperborea (Malmgren) Sabellides borealis Sars (1)

(1)

42. Hamilton Inlet, off Nat's Discovery Point, 54°14.9' N., 58°01' W., 45 fms., stony, Aug. 27, 1950; 0.7° C. (-1.7 to 0.8), 32°/oo.

Eunoe nodosa (Sars) (1) Harmothoe extenuata (Grube) (9)

43. Hamilton Inlet, 54°15' N., 57°45' W., 30 fms., mud, stones, Aug. 27, 1950; 1.0° C. (-1.7 to 1.0), 32°/oo.

Nephtys ciliata CMiiller) (4) Lysippe labiata Malmgren CI)

Laonice cirrata (Sars) (1) Pista flexuosa (Grube) (6)

44. Hamilton Inlet, Cape Porcupine, off South Strand near Pigeon Island, 53°54' N., 57°04' W., 13 fms., sand, Aug. 27, 1950; 4-5° C. (-1.6 to 6.0), 32°/oo.

Harmothoe imbricata (Linne) (3) Gattyana cirrosa (Pallas) (1)

45. St. Lewis Inlet, St. Mary's Harbor, 10 fms., mud, sandstone,

shell, Aug. 30, 1950; ?° C. (-1.6 to ?), ?°/oo.

Eunoe nodosa (Sars) (1) Pectinaria hyperborea (Malmgren) Harmothoe imbricata (Linne) (1) (7)

Lumbrineris fragilis (Miiller) (1)

46. St. Lewis Inlet, 52°21' N., 55°56.5' W., 35-40 fms., mud, Aug.

30, 1950; ?°C. (-1.6 to ?), ?°/oo.

Antinoe badia (Theel) (2)

47. Lake Melville, west end, 53°29' N., 59°58' W., 9-11 fms., mud, July 28, 1950; 2° C. (1.0 to 2.0), 15°/oo.

Nereis zonata Malmgren (1) Branchiomma infarcta (Kroyer) Pectinaria granulata (Linn6) (3) (1) Pista maculata (Dalyell) (20) 538 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 105

48. Lake Melville, anchorage off Northwest River, 6-7 fms., sandy mud, Aug. 23, 1950; 8° C. (1.0 to 8.0), S°/oo.

Anti7ioe sarsi Kinberg (5) Pectinaria granulata (Linn^) (3) Nephtys ciliata CMuller) (1)

49. Nain Bay, 35 fms., mud, Aug. 7, 1951; -1.0° C. (-1.4 to 0?), 3l7oo.

Antinoe hadia (Thdel) (3) Pectinaria hyperborea (Malmgren)

Harmoihoe extenuata (Grube) (2) (4)

50. Nain Bay, 45 fms., mud, Aug. 7, 1951; -1.4° C. (-1.4 to —1.0), 31.5°/oo.

Harmoihoe imbricata (Linn^^) (1) Pectinaria hyperborea (Malmgren) Harmothoe extenuata (Grube) (1) (I)

Pista flexuosa (Grube) (1)

51. Nain area, Strathcona Run off Nain, 55-60 fms., sandy mud, some stone, Aug. 5, 1951; 2.5° C. (? to 4.5), 30.75°/oo.

Harmothoe extenuata (Grube) (1)

52. Hamilton Inlet, Emily Harbor, 10 fms., mud, some rock, July 29, 1951; 4° C? (-1.6 to 8.0), 30.5°/oo.

Harmothoe imbricata (Linn(5) (4) Pista flexuosa (Grube) (2) Pectinaria granulata (Linn6) (1) Spirorbis spirillum (Linn6) (20)

53. Greater Lake Melville, Terrington Basin, 8 fms., mud, July 10, 1951; 6° C. (2.0 to 8.0), 10°/oo.

Aglaophamus malmgreni (Theel) Pista maculata (Dalyell) (1) (11)

54. Hamilton Inlet, Coliinghams' Cove, 7 fms., mud, sand, Aug. 13, 1951; 4° C. (-1.5 to 6.0), 28°/oo.

Harmothoe imbricata (Linne) (1) Nephtys ciliata (Miiller) (7)

55. Lake Melville, about 3 miles northeast of Sandy Point near entrance to Goose Bay, 17-19 fms., Aug. 26, 1951; 2.0° C. (0.5 to 2.5), 24°/oo.

Antinoe sarsi Kinberg (2) Nereis zonata Malmgren (2) Antinoe badia (Theel) (1) Scalibregma inflatum Rathke d) Harmothoe extenuata (Grube) (2) Pista maculata (Dalyell) (10)

56. St. Lewis Inlet, Islet Bay, Schooner Cove, 15-20 fms., mud, stone,

some rock, July 2, 1951; 1.0° C. (? to ?), 32°/oo.

Harmothoe imbricata (Linn6) (1) Pectinaria hyperborea (Malmgren) (1)

57. Lake Melville, 53°30' N., 59°59' W., 40 fms., mud, July 10, 1951; 0.0° C. (0.0 to 0.0), 26.5°/oo. POLYCHAETE WORMS—PETTIBONE 539

Aglaophamus malmgreni (Th^el) Pista flexuosa (GrubeJ (1) (3) Pista maculata (Dalyell) (4) Nicomache lumhricalis (Fabricius) Leaena abranchiata IMalmgren (6) (2)

58. Hamilton Inlet, Collinghams' Cove, 15 fms., rock, stones, July 5, 1951; 3° C. (-1.5 to 5.0), 297oo.

Harmothoe extenuata CGrube) (1) Eusyllis blomstrandi Malmgren (1)

59. Greater Lake Melville, Goose Bay, 30 fms., Aug. 26, 1951; 1.1° C. (0.3 to 1.5), 21.737oo.

Antinoe badia (Th^el) (2) Pista maculata (Dalyell) (3) Nereis zonata Malmgren (1) Branchiomma infarda (KroyeT) (I)

60. Greater Lake Melville, Goose Bay, 30 fms., mud, July 7, 1951; 1.4° C. (0.8 to 1.5), 21.9°/oo.

Antinoe sarsi Kinberg (4) Pisia maculata (Dalyell) (5) Antinoe badia (Th^el) (3) Branchiomma infarcta (Kroyer) Nereis zonata Malmgren (3) (1) Aqlaophamus malmgreni (Tli6el)

(5)

61. Hamilton Lilet, Collinghams' Cove, the Narrows, tide pool, July 19, 1951.

Harmothoe imbricata (Lmn6) (2)

62. Nain area, Strathcona Run off Nain, 60 fms., Aug. 8, 1951; 2.5° C. (? to 4.5), 30.75°/oo.

Harmothoe imbricata (Linne) (1) Autolytus fallax Malmgren (1) Harmothoe extenuata (Grube) (2) Nereis pelagica Linne (1) Gattyana cirrosa (Pallas) (1)

63. Lake Melville, south side, west of Eskimo Paps, 80 fms., Aug. 25, 1951; 0.7° C. (-0.6 to -1.0), 28.4°/oo.

Anti7ioe badia (Theel) (1) Branchiomma infarcta (Kroyer) Aglaophamus malmgreni (Theel) (2) (10)

64. Nain area, western end Nain Bay, 15-23 fms., Aug. 9, 1951; 0.5° C. (-1.5 to 3.0), 30.4°/oo.

Harmothoe imbricata (Linne) (4) Harmothoe extenuata (Grube) (3)

65. Newfoundland, Port Saunders, intertidal, June 28, 1951.

Harmothoe imbricata (Linn6) (5) Nereis virens (Sars) (2)

66. Nain area. Ford Harbor, 40 fms., Aug. 6, 1951; 0.0° C. (-1.5 to 2.0), 31.8°/oo.

Harmothoe imbricata (Linn6) (1) Spirorbis spirillum (Linne) (20) Harmothoe extenuata (Grube) (2)

366148—56- K

540 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 105

67. Lake Melville, The Backway, about 8 miles from east end, 54°06' N., 58°0r W., 15-16 fms., July 4, 1952; 0.0° C. (-0.6 to 2.0), Zo.o /oo-

Harmothoe extenuata (Grube) (1) Branchiomma infarcta (Kroyer) Nereis zonaia Malmgren (6) (5)

Nephtys ciliata ''Muller) (1) Spirorbis spirillum (Linn6) (3) Brada villosa (Rathke) (1) 68. Lake Melville, shoal area between Gull Island and Neveisik Island, 53°59' N., 58°48' W., 18-20 fms., July 4, 1952; 1.0° C. (-0.6 to 4.0), 25.5°/oo.

Harmothoe extenuata (Grube) (5) Pista maculata (Dalyell) (1)

69. Ironbound Islands, southwest end of Kidlialuit Island, 55°07' N., 58°45' W., 4-7 fms., July 13, 1952; 1.0° C? (-1.8 to 8.0), 31%'oo-

Arcteobia anticostiensis (Mcln- Phyllodoce mucosa Oersted (2)

tosh) (1) Pectinaria granulala (Liun^) (1)

70. Hebron Fjord, Hebron Harbor, 4-8 fms., July 18, 1952; 4° C. (-1.8 to 6.0), 29°/oo.

Harmothoe imbricata (Linne) (7) Harmothoe extenuata (Grube) (2)

71. Hebron Fjord, Hebron Harbor, 12 fms., July 20, 1952; 2° C. (-1.8 to 4.0), 31.5°/oo.

Harmothoe imbricata (LinnI) (4)

72. Okak area, channel east of Semekutak Island, about 5 miles north of Nutak, 4-15 fms., July 29, 1952; 3° C. (-1.6 to 6.0), 31°/oo.

Nereis pelagica Linne (1)

73. Okak area, Nutak Harbor just southwest of Cape Mugford, 3-3 fms., July 29, 1952; 5° C. (-1.6 to 8.0), 30%o.

Harmothoe imbricata (Linn^) (1) Praxillella praetermissa (Malm- gren) (1)

74. Hebron Fjord, about 3 mOes east of Freytag Inlet, 100 fms., July 31, 1952; -1.75° C. (-1.8 to -1.7), 32.8°/oo.

Antinoe badia (Th^el) (1) Pectinaria hyperborea (Malmgren) Prionospio mabngreni Clapar^de (!) (1)

75. Okak area, Nutak Harbor, 0-4 fms., Aug. 6, 1952; 6-7° C. (-1.6 to 8.0), 30°/oo.

Harmothoe imbricata (Linn6) (4)

76. Okak area, channel east of Semekutak Island, about 5 miles north

of Nutak, 4-15 fms., Aug. 9, 1952; 4° C. (-1.8 to 6), 30°/oo.

Nereis pelagica Linn4 (1) :

POLYCHAETE WORMS—PETTIBONE 541

77. Okak area, Kiglapait Harbor, about 15 miles northwest of Port Alan vers, 3-5 fms., Aug. 10, 1952; 5° C. (-1.8 to 8), 307oo.

Hannothoe imbricaia (Linn6) (9) Flabelligera affinis Sars (1)

78. Lake Melville, shoal area west of GuU Island, 17-20 fms., Aug. 24, 1952; 3.5° C. (-0.6 to 4.0), 257oo.

Harmoiho'e extenuata (Grube) (5) Nereis zonala Malmgren (5)

79. Lake Melville, The Backway, about 8 miles from east end, 54°06.3' N., 58°01.1' W., 16-20 fms., Aug. 25, 1952; 2° C. (-0.6 to 2.0), 257oo.

Melaenis lov6ni Malmgren (1) Branchiomma infarcta (Kroyer) (1)

Distribution of Labrador Polychaetes

The systematic, ecological, hydrographic, and geographic distri- butions of the Labrador polychaetes are summarized in table 1. The collections include 1,187 specimens representing 68 species and 22 families of Polychaeta. The Polynoidae are the most abundant as to number of species (11) as well as number of specimens (22 percent of the total number). The Terebellidae, Sabellidae, and Ampharetidae each have six species. The Labrador polychaete stations may be subdivided, on the basis of the hydrographic data of temperature, depth, and salinity, into three main categories (see table 2 for summary of hydrographic data and station numbers)

I. Permanent High Arctic: Marine environment where the waters are continuous with those of the Arctic Ocean and circumpolar areas (Labrador current water of Arctic origin). The water temperatures are below 0° C. (m^ostly around —1.8° C.) the year round, the depths are generally 30 to

50 fathoms, i. e., below the upper layers where summer warming takes place, and the salinity is about 32 °/oo. II. High Arctic with Summer Warming: Marine environment where the Arctic waters are in the shallow coastal areas and would be effected by the warming of the surface layers. The range of temperatures throughout the year is —1.8 to 12° C, the depths mostly 4 to 40 fathoms, and the sahnity mostly between 30 and 32 °/oo. III. Special Conditions in Greater Lake Melville Estuary: Lake Melville is separated from Hamilton Inlet and the Atlantic Ocean by both a con- striction and a sill (Xutt, 1953), resulting in a highly complicated exchange mechanism. The stations within Lake Melville may be subdivided into two categories: (a) Permanent High Arctic but not quite as cold. It includes the deeper areas of 30 to 100 fathoms, with bottom temperatures mostly between —0.6 to 0.0° C., and sahnities of about 28 °/oo. (b) Mostly above 0° C. with greater or lesser summer warming. It includes the shallower areas of mostly 15 to 30 fathoms, temperatures of mostly to 2° C., and salinities of mostly 21 to 25 °/oo. 542 PROCEEDINGS OF THE NATIONAL MUSEUM

a o 3

1 3 1 544 PROCEEDINGS OF THE NATIONAL MUSEUM

a o 3 .Q 'u

.2 '3 o.

o o

*s> POLYCHAETE WORMS—PETTIBONE 545

H K K X K H X K X

M ; X H ; K MM M « « I M

M M K M MM M M MM

t^ 00 r~ 00

d fe 8 C^S a b, ^^1 S "3 B S-2 s S. S: 2 « •2 „ •S S ^ -< ^^ _ W

2 "m q c9 5 a a J3 " S 5 a « ^-'' £ 5a *?• CD (9 « s >^ — .

546 PROCEEDINGS OF THE NATIONAL AIUSEUM

Table 2. Summaries of the hydrographir. data and the Labrador polychaete stations upon which they are based. (See fig. 1 for station locations)

III

Sppcial conditions of temperature and dilution in Greater Lake Melville Estuary

Permanent High High Arctic with Arctic summer warming (a) (b) Permanent High Mostly above 0° Arctic but not C; lower salinity quite as cold; higher salinity

Bottom temperature Mostly -1.8. Mostly -1.6-6.0-- Mostly -0.6-0.0- Mostly 0.0-2.0. in° C. Range: -1.85-0.0.. Range: -1.8-12.0. Range: -1.2-1.0.. Range: —0.6-8.0. Depth in fathoms. Mostly 30-50 Mostly 4-40 Mostly 15-30. Range: 15-125 Range: 0-60 Range: 30-100 Range: 6-40. Salinity in "%o— Mostly 32 Mostly 30-32 Mostly 28 Mostly 21-25. Range: 30.68-33.12. Range: 26-32.3.... Range: 26.5-28.85. Range: 8-26. Stations: Seven Islands Bay. 31,33,41 30 Hebron Fjord 10, 11, 12, 13, 14, 74. 18, 70, 71. Okak area.- 72, 73, 75, 76, 77. Nain area 49, 50 51, 62, 64, 66 Davis Inlet-- 20

Kaipokok Inlet 7, 8, 9, 19. Ironbound Islands.

Hamilton Inlet 23, 24, 27, 42, 43,

44, 52, 54, 58, 61. Greater Lake Mel- 28, 29, 34, 35, 36, 32, 38. 40, 47, 48, 53,

ville Estuary. 37, 39, 57, 63. 65, 69. 60, 67, 68. 78, 79.

Bt. Lewis Inlet 5, 6, 46. 16. 21, 45, 56

Strait of Belle Isle. 1, 2, 3, 4. 15, 17, 22, 25, 26.

The hydrographic distribution of the 65 polychaete species in the Blue Dolphin collections from Labrador (not including Harmothoe impar and Polyphysia crassa from the Owen Bryant collections from Labrador, and Nereis virens from Newfoundland only) are shown in table L Of the 44 species found only along the coast, inlets, and fjords (I or II or both, not in Lake Melville Estuary), 14 species were found only in I, 22 species only in II, and 8 species were in both I and 11. Of the eight species found only in the Greater Lake Melville Estuary, three (Phyllodoce groenlandica, Paranaitis kosteriensis, Ephesia gracilis) were only in III (a), two (Antinoe sarsi, Brada villosa) only in Ill(b), and three {Nereis zonata, Aglaophamus malmgreni, Scalibregma inflatum) were in both III (a) and (b). Of the 13 species found in both the outer coast as well as in the Greater Lake Melville Estuary, three {Antinoe badia, Harmothoe extenuata,

Pisia jiexuosa) w^ere in all four areas (I, II, Ill(a), and 111(b)); three {Pisia maculaia, Leaena abranchiata, Branchiomma injarcta) in —

POLYCHAETE WORMS—PETTIBONE 547

I, III (a), and Ill(b); three {Nephtys ciliata, Terebellides stroemii,

Spirorbis spirillum) in I, II, and Ill(b); a sinp;le species {Pectinaria granulata) in II and Ill(b); a single species {Melaenis loveni) in I and Ill(b); and two species (Nicomarhe lumhrkalis, Spirorbis (jranu- latus) in I and III (a).

Family Polynoidae

Genus Melaenis Malmgren, 1865

MeUienis loveni INJalnigren, 1865

Melaenis lovSni Wesenberg-Lund, 1953, p. 27.— Pettibone, 1954, p. 214. One large specimen was 90 mm. long and 25 mm. wide, including setae. New records: Labrador: Kaipokok Inlet and The Backway, Lake Melville, 16 to 45 fms., silt bottom; 2 specimens. Stations 19, 79. Distribution: Widely distributed in the Arctic. Also Bering Sea; off Labrador. In 1.7 to 111 fathoms.

Genus Antino'e Kinberg, 1855, sensu Malmgren, 1865

Key to the species of Antinoe from Labrador

1. Neurosetae of 2 kinds—with capillary tips and with slender, relativelj' obtuse and slightly curved ones. Anterior pair of eyes larger than posterior pair A sarsi Neurosetae all with capillary tips. Anterior and posterior pairs of eyea rather small, subequal A. badia

Antinoe sarsi Malmgren, 1865

Antinoe sarsi not Moore, 1909b, p. 135 (=A. badia, examined in USNM). Pettibone, 1954, p. 215. Harmothoe sarsi Wesenberg-Lund, 1953, p. 23. New records: Labrador: West end and Goose Bay, Lake Melville, 6 to 30 fms., on bottoms of mud; 12 specimens, Stations 38, 48, 55, 60. Distribution: Widely distributed in the Ai-ctic. Also Iceland, Faroes to Great Britain, the Baltic; Labrador to Maine; Bering Sea; north Japan Sea. In 3 to 1,215 fathoms.

Antinoe badia (Thecl, 1879)

Antinoe sarsi Malmgren, 1865, p. 75 (part).— Moore, 1909b, p. 135 (examined in USNM). Polynoe badia Theel, 1879, p. 18, pi. 1, figs. 9-12.— Wiren, 1883, p. 390. Harmothoe (Antinoella) badia Augener, 1928, p. 689; 1933, p. 199. Antinoella badia Gorbunov, 1946, p. 38.—Zatsepiu, 1948, p. 107, pi. 28, fig. 9b. Harmothoe badia Wesenberg-Lund, 1950a, p. 7; 1950b, p. 22; 1951, p. 15; 1953, p. 21.

366148—56- ;

548 PROCEEDINGS OF THE NATIONAL IVIUSEUM vol. loe

Description: Length 23-60 mm., width including setae 12-30 mm. Segments 35-37 (up to 70 mm. long, 39 segments (Augener, 1933)). Prostomium with delicate cephalic peaks; 4 eyes small, subequal. Antennae, dorsal cirri, parapodia, and general body shape similar to A. sarsi. Elytra thin, soft, smooth, with delicate short clavate papillae and scattered soft conical tubercles. Setae yellow or golden neurosetae all with capillary tips. Color in alcohol: Reddish brown middorsally up to or including dorsal tubercles and elytrophores ventral surface reddish brown or mthout color; elytra brownish, especially medially and posteriorly. Parasites: One specimen had the parasitic copepod Herpyllobius arcticus Steenstrup and Liitken attached to the prostomium (identified byPaulIllg). New records: Labrador: Seven Islands Bay, Hebron Fjord, Nain area, Kaipokok Inlet, Lake Melville, Goose Bay, St. Lewis Inlet, 10 to 100 fms., on bottoms of mud, silt, mud with rock; 30 specimens, Stations 7, 11, 28-30, 33, 39, 40, 46, 49, 55, 59, 60, 63, 74. Franz Josef Land: Aberdore Channel east Alger Island, 10 fms., Baldwin-Zeigler Polar Expedition, 1901. Distribution: Widely distributed in the Arctic: Canadian Arctic, Davis Strait, Greenland, Jan Mayen, Norwegian Sea, Spitsbergen, Franz Josef Land, Novaya Zemlya, Kara Sea, Siberian Arctic. Also Iceland, Faroes, Skagerrak; Labrador; Bering Sea. In 10 to 1,956 fathoms.

Genus Euno'e Malmgren, 1865

Euno'e nodosa (Sars, 1860)

Euno'e nodosa Pettibone, 1954, p. 217, fig. 26, c. Harmothoe {Euno'e) nodosa Wesenberg-Lund, 1953, p. 16 (part). New records: Labrador: Seven Islands Bay, Hebron Fjord, Hamilton Inlet, St. Lewis Inlet, Strait of Belle Isle, 10 to 95 fms., on bottoms of mud, stones, rubble, and various combinations of stones, mud, rocks, sandstone, and shell; 7 specimens, Stations 4, 11, 30, 33, 42, 45. Distribution: Widely distributed in the Arctic. Also Iceland, Scandinavian coasts to English Channel; Hudson Bay to Massachu- setts; Bering Sea; north Japan Sea. In 10 to 690 fathoms.

Euno'e oerstedi Malmgren, 1865

Euno'e oerstedi Pettibone, 1954, p. 219, fig. 26, d. New records: Labrador: Seven Islands Bay, Strait of Belle Isle, 25 to 40 fms., on bottoms of coral and rock, rubble, and mud with rock; 3 specimens, Stations 2, 4, 31. POLYCHAETE WORMS—PETTIBONE 549

Distribution: Widely distributed in the Arctic. Also from Nor- way to English Channel; Labrador to Massachusetts; Bering Sea to central California; Japan. In low water to 516 fathoms.

Genus Harmothoe Kinberg, 1857

Key to the species of Harmothoe from Labrador

1. Anterior pair of eyes anteroventral on prostomium (slightly posterior and lateral to cephalic peaks), not visible dorsally. Elytra with or without soft globular macrotubercles near posterior border H. imbricata Anterior pair of eyes anterolateral on prostomium, visible dorsally 2 2. Elytra with macrotubercles globular, sausage-shaped, or elongate, rodlike,

not wider at base and sharply set off from el3'tral surface . . . H. extenuata Elytra with soft macrotubercles near posterior border, wider at base, not sharply set off from elytral surface H. impar

Harmothoe imbricata (Linne, 1767)

Harmothoe imbricata Moore, 1909b, p. 134 (part; mixed with H. extenuata).— Wesenberg-Lund, 1953, p. 17.— Pettibone, 1954, p. 220, fig. 26,a,c. Laenilla glabra Moore, 1909b, p. 135; not L. glabra Malmgren, 1865 (examined in USNM).

New records: Labrador: Seven Islands Bay, Hebron Fjord, Okak area, Nain area, Hamilton Inlet, Backway, Lake Melville, St. Lewis Inlet, Strait of Belle Isle. Ne^vfoundland. Intertidal to 60 fms., on bottoms of mud, sand, and various combinations of mud, sand, sandstone, rock, coral, shells, detritus, and in tide pool; 56 specimens, Stations 2, 23, 24, 30, 33, 44, 45, 50, 52, 54, 56, 61, 62, 64-66, 70, 71, 73, 75, 77. Distribution: Widely distributed in the Arctic. Also Iceland and Norway to Mediterranean and Adriatic; Labrador to New Jersey; Bering Sea to southern California; Japan. In low water to 2,030 fathoms. Harmothoe exteniiata (Grube, 1840)

Lagisca extenuata Wesenberg-Lund, 1953, p. 25. Harmothoe extenuata Pettibone, 1954, p. 222.

New records: Labrador: Seven Islands Bay, Hebron Fjord, Nain area, Davis Inlet, Kaipokok Inlet, Hamilton Inlet, east and west ends Lake Melville, St. Lewis Inlet, Strait of Belle Isle, 4 to 100 fms., on bottoms of mud, silt, stones, rubble, and various combinations of mud, coral, sand, rocks, pebbles, stones; 73 specimens.

Stations 1, 2, 4, 6, 7, 9, 14, 16, 20-22, 25, 26, 31, 33, 36, 42, 49-51, 55, 58, 62, 64, 66-68, 70, 78. Off Labrador: Egg Harbor, 7 fms.; 20 miles northeast Nain; shoal southeast of Nain; St. Pierre Harbor, 5 fms., all by Owen Bryant, 1908. —

550 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lOB

Distribution: Widely distributed in the Arctic. Also Iceland, Norway to Mediterranean and Adriatic; Hudson Bay to Chesapeake Bay; Bering Sea to southern California; north Japan Sea; South Africa. In low water to 1,000 fathoms.

Ilarrnothoe imjMir (Jolinsloii, 1839)

Polynoe impar Johnston, 1839, p. 436, pi. 22, figs. 3-9.—Theel, 1879, pp. 9, 15. Evarne impar Malmgren, 1865, p. 71, pi. 9, fig. 7.—Verrill, 1881, p. 319.—Not Mcintosh, 1900, p. 353, figs.—Not Southern, 1914, p. 53. Harmothoe impar Moore, 1902, p. 270.—Not Alaejos y Sanz, 1905, p. 60, figs.

Ditlevsen, 1917, p. 12, fig. 1, pi. 2, fig. 16, pi. 3, fig. 11.—Eliason, 1920, p. 20.—Not Faiivel, 1923, p. 59, fig. 21,a-f.— Augener, 1928, p. 678; 1933, p. 197.—Annenkova, 1937, p. 151, pi. 1, figs. 4, 8; 1938, p. 135.—Gorbunov, 1946, p. 38.—Thorson, 1946, p. 48.—Not Zatsepin, 1948, p. 108, pi. 28, fig. 12,b-f,h.—Wesenberg-Lund, 1950a, p. 6; 1950b, p. 21; 1951, p. 14 (part); 1953, p. 19. Harmothoe fragilis Moore. 1910, p. 353, pi. 29, figs. 29, 30, pi. 30, figs. 31-33; 1923, p. 256. Harmothoe bonitensis Essenberg, 1917, p. 48, pi. 2, figs. 1-11. Evarnella impar Chamberlin, 1920, p. 7.—Treadwell, 1937, p. 25 (part; examined in USNM). Harmothoe impar var. grandispina Annenkova, 1937, pp. 152, 208, pi. 1, fig. 2; 1938, p. 135. Harmothoe impar var. parvispinosa Annenkova, 1937, pp. 152, 209, pi. 2, fig. 10; 1938, p. 135. Description: Segments 37-41. Body wide, flattened dorsoventrally, fragmenting easily. Prostomium with cephalic peaks prominent; eyes large, anterior pair dorsolateral in region of greatest prostomial width. Antennae and dorsal cirri with short papillae. Elytra with numerous conical microtubercles—some hooked, with short delicate scattered papillae on elytra! border and sm'face, with large soft tubercles near external border, tubercles wider at the base and not sharply set off from elytral surface (may give border of elytra a scalloped effect). (The elytra differ thus from the description of H. impar as given by Mcintosh (1900), Fauvel (1923), and others; this has been indicated previously by Ditlevsen (1917).) Noto- and neuropodia extend out into digitiform acicular lobes; tip of neuropodial lobe with tentacularlike process above the projecting aciculum. Notosetae distinctly stouter than neurosetae, with long spinous regions, with pointed to blunt bare tips. Neurosetae delicate, with long spinous regions, upper ones more slender, with entire tips; mostly with tips slightly hooked, with a secondary tooth or a remnant

of it. Color in alcohol: Darkly pigmented dorsally, with wide transverse brown bands between the elytrophores and dorsal tubercles, with an area without color middorsally and two transverse bands converging in the region of the elytrophores and dorsal tubercles; elytra with mottled brownish coloration. POLYCHAETE WORMS—PETTIBONE 551

New records: Labrador: Halfway between Cape Mugford and Hebron, 60 fms., Owen Bryant, 1908. Canadian Arctic: Ducketts Cove, Hurd Channel, Melville Peninsula, 12 fms., 1933; east end Cobourg Island, Baffin Bay, 75°40' N., 78°50' W., 23-40 fms., 1935; south end Cobom-g Island, 75°40' N., 78°58' W., 11-20 fms.; all by R. A. Bartlett. East Coast North America: Off Nova Scotia, Maine, Massachusetts, 20-112 fms., U. S. Fish Commission (Verrill, identified). Distribution: Widely distributed in the Arctic. Also Danish Seas; Labrador to Massachusetts; southern California; north Japan

Sea. In 1 to 1,611 fathoms.

Genus Arcteobia Annenkova, 1934

Arcteobia anlicostiensis (Mcintosh, 1874)

Eupolynoe anlicostiensis Moore, 1909b, p. 136. Arcteobia anticostiensis Pettibone, 1954, p. 225.

Four specimens were commensal in the sinuous tubes of the terebellid Pista flexuosa (Grube), one worm per tube; also one specimen was in a broken clay tube of a maldanid. New records: Labrador: Hebron Fjord, Ironbound Islands, St. Lewis Inlet, 4-95 fms., on bottoms of mud, mud and rock; 9 specimens,

Stations 5, 11, 14, 69. Distribution: Arctic Alaska; Labrador to Massachusetts; Bering Sea; north Japan Sea. In low water to 123.5 fathoms.

Genus Gattyuna Mcintosh, 1897

Key to the species of Gattyana from Labrador

1. Elytral microtubercles 1- to 4-pronged. Lower neurosetae with the bare distal tips not longer than the spinous regions G. cirrosa Elytra microtubercles conical and bifid. Lower neurosetae with the bare tips as long as or longer than the spinous regions G. aniondscni

Gattyana cirrosa (Pallas, 1766)

Gattyana cirrosa Moore, 1909b, p. 135.—Wesenberg-Lund, 1953, p. 15.—Petti- bone, 1954, p. 226, fig. 26,b. New records: Labrador: Seven Islands Bay, Hebron Fjord, Nain area, Kaipokok Inlet, Hamilton Inlet, 13-125 fms., on bottoms of mud, silt, sand, and various combinations of mud, rock, pebbles, and sand; in old tubes of Pectinaria; in old clay tube of a maldanid;

68 specunens, Stations 7, 9-12, 14, 18, 31, 44, 62. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to France; Hudson Bay to Massachusetts; Bering Sea to Washington; north Japan Sea. In low water to 630 fathoms. 552 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los

Gattyana amondseni (Malmgren, 1867)

Nychia amondseni Malmgren, 1867, p. 5, pi. 1, fig. 4. — Verrill, 1881, pp. 303, 306.—Webster and Benedict, 1884, p. 700. Gattyana amondseni Moore, 1902, p. 259; 1908, p. 336; 1909b, p. 136.—Augener, 1928, p. 693; 1933, p. 204.—Thorson, 1946, p. 46.—Wesenberg-Lund, 1950a, p. 5; 1950b, p. 14; 1951, p. 10. Description: Length 16-18 mm., width including setae 6-8 mm. (up to 29 mm. long, 11 mm. wide, Malmgren, 1867). Segments 35-36. Papillae on antennae, dorsal cirri, and elytra much shorter than on G. cirrosa. Elytra smooth, iridescent, with elytral fringe confined mostly to external border, not having the straggly appear- ance of G. cirrosa. Elytra whitish, uniformly tan, tan mottled with brown, or tannish with a darker spot over the place of attachment. Elytral microtubercles smaller than in G. cirrosa, conical and bifid. New records: Labrador: Hebron Fjord, 60-95 fms., on bottoms of mud and fine sandy mud with rock; 2 specimens. Stations 10, 11. East Coast North America: Off Nova Scotia, Massachusetts, Rhode Island, 13-90 fms., U. S. Fish Commission (Verrill, identified). Distribution: Scattered records in the Arctic: Baffin Ba.y, Davis Strait, West Greenland, Spitsbergen. AJso west coast of Norway; Labrador to Rhode Island; southeastern Alaska and Gulf of Alaska. In 5 to 378 fathoms.

Family Sigalionidae

Genus Pholo'e Johnston, 1839

Pholoe minuta (Fabricius, 1780)

Pholoe minuta Wesenberg-Lund, 1953, p. 28.— Pettibone, 1954, p. 230, fig. 26,f. New record: Labrador: Hamilton Inlet, 6 fms., mud and sand; 4 specimens, Station 24. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to northern France; Labrador to Rhode Island; Bering Sea to southern Oregon; north Japan Sea; South Africa. In low water to 1,254 fathoms. Family Phyllodocidae

Both genera represented have the prostomium with 4 subulate frontal antennae, tentacular cirri 4 pairs on 3 tentacular segments, uniramous parapodia with compound setae.

Key to the genera of Phyllodocidae from Labrador

1. First tentacular segment rudimentary dorsally, with 1 pair tentacular cirri lateral to prostomium; second segment distinct, with 2 pairs tentacular cirri; third segment distinct, with 1 pair tentacular cirri, 1 pair normal ventral POLYCHAETE WORMS—PETTIBONE 553

cirri, with the first setigerous lobes. Prostomium cordiform, with an occipital tubercle in the posterior notch (may be withdrawn). Phyllodoce (Anaitides) First 2 tentacular segments fused, well developed, encircle prostomium, with 3 pairs tentacular cirri; third tentacular segment distinct, with 1 pair tentacular cirri, 1 pair normal ventral cirri, with the first setigerous lobes. Prostomium oval or oval with a posterior extension, with or without an occipital tubercle Paranaitis Genus Phyllodoce Savigny, 1817

Subgenus Anaitides Czerniavsky, 1882

Both species have the proboscis with 12 longitudinal rows of papillae basally, 6 on each side, 8 to 20 papillae per row.

Key to the species of Phyllodoce (Anaitides) from Labrador

1. Ventral cirri distally blunt or slightly pointed. Dorsal cirri subrectangular. P. groenlandica Ventral cirri acutely pointed distally. Anterior dorsal cirri suboval, median ones subrectangular P. mucosa

Phyllododce {Anaitides) groenlandica Oersted, 1843

Phyllodoce groenlandica Wesenberg-Lund 1953, p. 30.— Pettibone, 1954, p. 236i fig. 27,d,i. Phyllodoce mucosa Moore, 1909b, p. 134; not P. mucosa Oersted, 1843 (examined in USNM). New record: Labrador: East end Lake Melville, 70 fms., mud;

1 specimen, Station 29. Distribution: Widely distributed in the Arctic. Also Ireland, Scandinavian countries to English Channel; Hudson Bay to Massa- chusetts; Bering Sea to Washington Sound; north Japan Sea. In low water to 800 fathoms.

Phyllododce (Anaitides) mucosa Oersted, 1843

Phyllodoce mucosa Malmgren, 1867, p. 21, pi. 2, fig. 7.—Webster and Benedict, 1887, p. 710.— Moore, 1909a, p. 336; not 1909b, p. 134.—Fauvel, 1923, p. 152, fig. 54,a-e.— Rioja, 1941, p. 682.—Berkeley and Berkeley, 1948, p. 46, fig. 68.—Wesenberg-Lund, 1950a, p. 10, pi. 1, fig. 3; 1950b, p. 34; 1951, p. 27. Anaitides mucosa Friedrich, 1939, p. 122.—Hartman, 1948, p. 19. —Zatsepin, 1948, p. Ill, pi. 29, fig. 4,b-c. New records: Labrador: Ironbound Islands, 4-7 fms.; 2 specimens, Station 69. East Coast North America: Off Maine, Long Island Sound, Gulf of Mexico, in low water to 146 fms., U. S. Fish Commission.

Distribution: Scattered records in the Arctic: Greenland (?), Barents Sea, Siberian Arctic. Also Iceland, Faroes, Danish and Swedish coasts to France, Mediterranean; Hudson Ba,v to Long Island Sound, Gulf of Mexico, Alaska to southern California and Mexico. In low water to 245 fathoms. 554 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los

Genus Paranaitis Southern, 1914

Paranaitis kosteriensis (Malmgren, 1867)

Anaitis kosteriensis Malmgren, 1867, p. 20.—Bergstrom, 1914, p. 156, fig. 52. Paranaitis wahlbergi Southern, 1914, p. 67, pi. 8, fig. 16 (see Fauvel, 1923); not Anaitis wahlbergi Malmgren, 1865. Phyllodoce (Anaitis) kosteriensis Fauvel, 1923, p. 157, fig. 56,a-c.

Description: Length 35 mm., width without setae 4 mm. (up to 85 mm. long, Bergstrom, 1914). Segments numerous, 82 (specimens from Labrador) to about 155 (Fauvel, 1923). Body rather slender, flattened dorsoventrally, slightly attenuated anteriorly and posteriorly. Prostomium oval, with a distinct posterior extension, usually with an occipital tubercle (not seen on specimen examined; hidden by tentacular segment ?) , with 4 short antennae and 2 large eyes each with a distinct lens. Tentacular cirri rather slender, longest reach setiger 4. Dorsal cirri large, imbricated, reniform, nearly symmetrical, easily detached. Distal tips of bifid setigerous lobe with upper lobe longer than the lower one. Color in alcohol : Without color or irregu- larly streaked deep purplish. Remarks: P. kosteriensis has been referred to P. wahlbergi Malm- gren hy Ditlevsen (1909, 1917), Southern (1914), and others; the two species appear to be distinct. In P. wahlbergi (specimens examined from Greenland and Canadian Arctic), the bodj^ is stouter (6-9 mm. wide without setae) ; the prostomium is oval, without distinct posterior extension, without occipital tubercle; the distal tips of the bifid setigerous lobes are subequal or upper lobes slightly longer. New record: Labrador: East end Lake Melville, mud, 70 fms.; 1 specimen. Station 29. Distribution: Sweden, Scotland, Ireland; Labrador. In 6 to 185 fathoms.

Family Hesionidae

Genus Castalia Savigny, 1820; emend. Fauvel, 1923

Castalia aphroditoides (Fabricius, 1780)

Castalia aphroditoides Wesenberg-Lund, 1953, p. 34.—Pettibone, 1954, p. 239, fig. 28,a,b.

New records: Labrador: Kaipokok Inlet, 45 fms., silt bottom; 2 specimens, Stations 7, 8. Distribution: Widely distributed in the Arctic. Also Bering Sea;*Denmark; Hudson Bay to Labrador. In 2 to 75.5 fathoms. POLYCHAETE WORMS—PETTIBONE 556

Family Syllidae

Genus Autolytus Grube, 1850

Autolylus alexandri Malmgren, 1867

Autolytus alexandri Pettibone, 1954, p. 246.

New record: Labrador: Strait of Belle Isle, 30-40 fins.; 1 specimen, Station 22. Distribution: Widely distributed in the Arctic. Also Iceland, Labrador to North Carolina; Bering Sea to Washington. In low- water to 123.5 fathoms; sexual forms at surface.

Autolytus fullax IMalmgreii, 1867

Autohjtus fallax Pettibone, 1954, p. 247, fig. 29,c-f. New records: Labrador: Nain, Strait of Belle Isle, 25-60 fms., on bottoms of coral and rock; in transparent tube on old Pectinaria

tube; 2 specimens, Stations 2, 62. Distribution: Widely distributed in the Arctic. Also Faroes; Labrador. In low water to 75.5 fathoms; sexual stolons at surface.

Genus Sphaerosyllis Claparede, 1863

Sphaerosyllis erinaceus Claparede, 1863

Sphaerosyllis erinaceus Pettibone, 1954, p. 255, fig. 28,m. A single specimen of 20 segments, 1.5 mm. long and 0.3 mm. wide without setae. New record: Labrador: Strait of Belle Isle, 25 fms., coral and rock; 1 specimen, Station 2. Distribution: Widely distributed in the Arctic. Also Iceland, Denmark to English Channel and the Baltic; Labrador to Massachu- setts; Bering Sea; north Japan Sea. In low water to 75.5 fathoms; sexual forms at surface.

Genus BusyHis Malmgren, 1867

Eusyllis blomstrandi Malmgren, 1867

Eusyllis blomstrandi Wesenberg-Lund, 1953, p. 38.—Pettibone, 1954, p. 260, fig. 28,g-i. Length 5.5-11 mm., width without setae 0.8-1 mm. Segments 47-52. Includes two epitokous females and a male, with 16 anterior unmodified setigers, 25-27 setigers with long capillary setae, and 5-8 posterior unmodified setigers. New records: Labrador: Hamilton Inlet, Strait of Belle Isle, 15-30 fms., on bottoms of rock, stones, with bryozoans; 21 specimens.

Stations 1, 2, 22, 26, 58.

366148—66 i 556 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los

Distribution: Widely distributed in the Arctic. Also Iceland, Ireland to Mediterranean; Labrador to Maine; Bering Sea to Wash- ington; north Japan Sea. In low water to 444 fathoms; sexual epitokes at surface. Family Nereidae

Genus Nereis Cuvier, 1817

Key to the subgenera and species of Nereis from Labrador and Newfoundland

1. Three notopodial ligules in anterior segments. Dorsal ligules enlarged, foliaceous, lanceolate, with dorsal cirri emerging near bases of ligules. Parag- naths present on all 8 areas of proboscis N. (Ncantbes) virens Two notopodial ligules. Paragnaths of areas I or V or both missing {N. {Nereis)) 2

2. Parapodial ligules short, thick, evenly rounded. Paragnaths of distal ring: area I (mediodorsal), 2 in tandem (rarely 1 or 3). Paragnaths of basal ring: area V (dorsomedial), 0; area VI (dorsolateral), 4 in square or cross in (rarely 3 or 5) ; VII-VIII (ventral), several continuous rows, diminishing size progressively posteriorly. Uniformly purplish or reddish brown, not banded N. (Nereis) pelagica Parapodial ligules triangular to conical, gradually tapering to a broad tip. Paragnaths of distal ring: area I, or 1. Paragnaths of basal ring: area V, 0; area VI, 6-10 or more in oval mass; areas VII-VIII, continuous row of larger paragnaths followed by a wide band of small subequal ones. Trans- versely banded reddish brown or violet iV. (Nereis) zonata

Nereis {iSeamhes) virens .Sars, 1835

Alitta virens Malmgren, 1865, p. 183; 1867, p. 56, pi. 3, fig. 19. Nereis virens Webster and Benedict, 1884, p. 717; 1887, p. 724.—Sumner, Osburn, and Cole, 1913, p. 620.—Fauvel, 1923, p. 348, fig. 134,g-k.—Not Annenkova, 1938, p. 160.—Thorson, 1946, p. 69.—Not Berkeley and Berkeley, 1948, p. 62, fig. 92; 1954, p. 458— Not Zatsepin, 1948, p. 119, pi. 30, fig. 4.— Wesenberg-Lund, 1951, p. 42. Neanthes virens Hartman, 1944a, pp. 335, 339.

Remarks: The Atlantic A'', mrens differs from the closely related Pacific N. brandti (Malmgren) as follows: In N. virens, the upper ligules are large, foliaceous, lanceolate almost from the first; in N. brandti, the upper ligules are small, conical on anterior segments, gradually becoming larger and foliaceous in middle and posterior segments. In N. virens, paragnaths of areas VII-VIII (ventral) of basal ring consisting of transverse band of 3 irregular rows; that of N. brandti consisting of about 8 rows, with the paragnaths larger anteriorly and getting smaller posteriorly. New records: Newfoundland: Port Saunders, intertidal; 2 specimens, Station 65. East Coast North America: Off Newfound- land, Gulf of St. Lawrence, Nova Scotia, New Brunswick, Maine, POLYCHAETE WORMS—PETTIBONE 557

Massachusetts, Rhode Island, Connecticut, Long Island Sound; low water to 84 fathoms, U. S. Fish Commission. Distribution: Iceland (rare), Norway, Denmark to North Sea and France; Newfoundland to Virginia. Mainly littoral; up to 84 fathoms. (Records of N. virens from the Pacific, north Japan Sea, and Siberian Arctic are the closely related A^. brandti (Malmgren).)

Nereis (Nereis) pelagica Linne, 1758

Nereis pelagica Moore, 1909b, p. 137.—Wesenberg-Lund, 1953, p. 40.—Pettibone, 1954, p. 264, fig. 30,a,b. New records: Labrador: Okak area, Nain, St. Lewis Inlet, Strait of Belle Isle, 4-60 fms., on bottoms of sand, rock and coral; 14 specimens, Stations 1, 2, 16, 22, 62, 72, 76. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to Mediterranean; Hudson Bay to Long Island Sound; Bering Sea to Panam^; north Japan Sea to Japan; South Atlantic (Tristan da Cunha, Kerguelen, Magellan Straits). In low water to 609 fathoms. Variety occidentalis Hartman, off North Carolina, Florida, Louisiana, Texas, Puerto Rico; intertidal.

Nereis (Nereis) zonata Malmgren, 1867

Nereis zonata Wesenberg-Lund, 1953, p. 40.—Pettibone, 1954, p. 265, fig. 30,c,h,i. New records: Labrador: Backway, east and west ends Lake Melville, Goose Bay, all in Greater Lake Melville area, 9-100 fms,, on bottoms of mud and sandy mud with rocks; 37 specimens. Stations 29, 34, 36, 38, 40, 47, 55, 59, 60, 67, 78. Distribution: Widely distributed in the Arctic. Also Iceland, Faroes; Hudson Bay to Labrador; Bering Sea to Oregon; north Japan Sea. In low water to 439 fathoms; epitokes at surface.

Family Nephtyidae

Key to the genera of Nephtyidae from Labrador

1. Branchiae involute, long, cylindrical, curved or rolled in spiral toward lateral side of body Aglaophamus Branchiae recurved, cirriform, sickle-shaped, with conve.x side toward lateral side of body Nephtys

Genus Aglaophamus Kinberg

Aglaopfuimus malmgreni (Th^el, 1879)

Nephthys longisetosa Malmgren, 1865, p. 106, pi. 12, fig. 20; not N. longosetosa Oersted, 1843. Nephthys malmgreni Th6el, 1879, p. 26, pi. 1, fig. 17, pi. 2, fig. 17.—Not Moore, 1908, p. 342.—Fauvel, 1923, p. 371, fig. 145,k.—Augener, 1928, p. 702.— Annenkova, 1931, p. 203; 1937, p. 164; 1938, p. 162.— Gustafson, 1936, p. 6.— 558 PROCEEDINGS OF THE NATIONAL JVIUSEUM vol. los

Friedrich, 1939, p. 123.—Berkeley and Berkeley, 1944, p. 2.—Gorbunov, 1946, p. 38.—Wesenberg-Lund, 1950a, p. 22; 1950b, p. 61; 1953, p. 45. Aglaophamus malmgreni Hartman, 1950, pp. 116, 118. Description: Length 70-120 mm., width including setae 13 mm. Tentacular segment with a nolo- and neuropodial setigerous lobe, with a triangular ventral cirrus; dorsal tentacular cirri lacking. Parapodia with rami well separated, acicular lobes sharply conical; preacicular lamellae rudimentary; notopodial postacicular lamellae in anterior and median regions unequally bilobed—larger upper one (about length of acicular lobe) and small ventral one; about equally bilobed in posterior region; neuropodial postacicular lamellae rounded, shorter than acicular lobes. Setae long, flowing. Dorsal cirri long, digitiform. Ventral cirri sharply conical. Branchiae begin usually on setigers 11-13 (10-15), long, cylindrical, rolled in spiral toward inside (when preserved, may extend out, with tip hooked or curled

inwardly) ; branchiae lacking on last 14-30 segments. Proboscis with the usual 22 terminal papillae— 10 pau's bifid, a single dorsal and ventral one; with 14 longitudinal rows of subterminal papillae (with some additional scattered papillae more distally, 17-20 papillae per row (10-13 in Fauvel, 1923), decreasing in size basally; without an unpaired dorsal papilla. Color in alcohol: Deep reddish brown to buff. New records: Labrador: East end, middle, and west end Lake Melville, Goose Bay, Terrington Basin; all in Greater Lake Melville area, 8-80 fathoms, on mud bottom; 38 specimens, Stations 29, 39, 53, 57, 60, 63. Distribution: Widely distributed in the Arctic: Siberian and western Canadian Arctic, Davis Strait, Greenland, Spitsbergen, Norway, Franz Josef Land, Barent Sea, Novaya Zemlya, Kara Sea, Siberian Arctic, Laptev Sea. Also south to Portugal and the Medi- terranean, Gulf of St. La\vrence, Bering Sea, north Japan Sea. In 3 to 4,001 fathoms.

Genus Nephtys Cuvier, 1817

Nephtys longosetosa Oersted, 1843

Nephtys longosetosa Pettibone, 1954, p. 268, fig. 30,1.

New record: Labrador: Hebron Fjord, 8 fms., sand}^ (1 station, 14 specimens); Station 27. Distribution: Widely distributed in the Ai'ctic. Also south to France, Maine, Lower California and Panamd, north Japan Sea; Straits of Magellan. In low water to 528 fathoms.

Nephtys ciliata (Miiller, 1789)

Nephthijs caeca Moore, 1909b, p. 137; not Nereis caeca Fabricius, 1780. Nephthys ciliata Monro, 1939, p. 346.—Wesenberg-Lund, 1953, p. 43. Nephtys ciliata Pettibone, 1954, p. 270, fig. 30,n. —

POLYCHAETE WORMS—PETTIBONE 559

New records: Labrador: Hebron Fjord, Davis Inlet, Kaipokok Inlet, Hamilton Inlet, Backway, and west end Lake Melville, Strait of Belle Isle, 6 to 95 fms., on bottoms of mud, silt, rubble, muddy- sand, rocks, pebbles with sand; 28 specimens. Stations 7, 11, 17, 18, 20, 24, 43, 48, 54, 67. Distribution: Widely distributed in the Arctic. Also south to France, Massachusetts, southern California, Japan and China. In low water to 500 fathoms.

Family Sphaerodoridae

Prostomium indistinct, covered with papillae. Eyes 2 or 4, under integument. Integument covered with small papiUae and number of large spherical capsules. Parapodia uniramous, covered with papillae. Proboscis unarmed, globular.

Genus Ephesia Rathke, 1843

Ephesia gracilis Rathke, 1843

Ephesia gracilis Rathke, 1843, p. 176, pi. 7, figs. 5-8.— Webster and Benedict, 1887, p. 728.—Fauvel, 1923, p. 377, fig. 148,a-f.—Augener, 1928, p. 736.— Berkeley and Berkeley, 1944, p. 2.—Annenkova, 1937, p. 165; 1938, p. 163. Gorbunov, 1946, p. 38.— Zatsepin, 1948, p. 122.—Wesenberg-Lund, 1950a, p. 22; 1950b, p. 63; 1951, p. 48; 1953, p. 46.

Sphaeordorum papillifer Moore, 1909a, p. 333, pi. 15, figs. 11, 12.

Ephesia papillifer Berkeley and Berkeley, 1948, p. 27. Description: Body elongated, filiform, about 120 segments. Spherical capsules in two dorsolateral longitudinal rows; capsules with short terminal processes. Eyes 4. Setae simple. New records: Labrador: East end Lake Melville, 65-100 fms., sandy mud, some rock; 1 specimen. Station 36. Canadian Arctic: Baffin Island, 66°43' N., 80°07' W., 1927., R. A. Bartlett. North- west Greenland: 1 mile northwest of Conical Rock, 1940, R. A. Bartlett. Distribution: Widely distributed in the Arctic: Canadian Arctic, Greenland, Spitsbergen, Novaya Zemlya, Kara Sea, Siberian Arctic. Also Iceland, Norwegian coast to France, Mediterranean; Labrador to Maine; Bering Sea to southern California; north Japan Sea; Ant- arctic. In 25 to 723 fathoms.

Family Onuphidae

Prostomium with 2 globular ventral palps, 7 antennae—2 frontal, ovoid, and 5 occipital with more or less ringed ceratophores. An- terior parapodia more or less modified. Pharynx with a labrum and 3-5 pahs of jaws and an unpaired piece. Tentacular segment achae- tous and apodous. 560 PROCEEDINGS OF THE NATIONAL MUSEUM vol.106

Genus Nothria Malmgren, 1867

Tentacular segment with two short tentacular cirri. Branchiae simple, cirriform. Nothria conchylega (Sars, 1835)

Onuphis conchylega Sars, 1835, p. 61, pi. 10, fig. 28,a-e.—Chamberlin, 1920, p. 15.—Fauvel, 1923, p. 415, fig. 164,a-m.—Treadwell, 1937, p. 31.—Annen- kova, 1937, p. 166; 1938, p. 166.—Berkeley and Berkeley, 1944, p. 3; 1948, p. 91, figs. 136-138.—Gorbunov, 1946, p. 39.—Zatsepin, 1948, p. 124, pi. 31, fig. 16.— Wesenberg-Lund, 1950a, p. 26; 1950b, p. 67; 1951, p. 53; 1953, p. 49. Nothria conchylega Malmgren, 1867, p. 66.— Moore, 1909a, p. 138.—Hartman, 1944a, pp. 335, 340, not pi. 23, fig. 4; 1944b, p. 85, pi. 5, figs. 105-112, pi. 17, figs. 337, 338; 1945, p. 24.

Description: Branchiae begin on setigers 10-20. Anterior parapodia with presetal lamellar process and large amber-colored uni- dentate hooks. Without compound spinigerous setae. Tube free, greatly flattened, parchmentlike base covered with flat shell frag- ments and pebbles. New records: Labrador: Strait of Belle Isle, on bottom of coral and rock, 25 fms.; 1 specimen, Station 2. East Coast North America: Off Newfoundland, Nova Scotia, Maine, Massachusetts, Rhode Island, Delaware Bay, 18 to 430 fms., U. S. Fish Commission (Verrill, identified). West Greenland: Upernavik Harbor, 13 fms., and off Hare Island, 70°20' N., 56° W., 90 fms., 1884, U. S. S. Alert. Bering Sea: Albatross Station 3548, 54°44' N., 165°42' W., 91 fms., 1893. Distribution: Widely distributed in the Arctic: Siberian and Canadian Arctic, Davis Strait, Greenland, Jan Mayen, Spitsbergen, Novaya Zemlya, Kara Sea. Also Iceland, Faroes, Norway to France and Mediterranean; Labrador to Florida and West Indies; Bering Sea to British Columbia; north Japan Sea to Japan. In low water to 954 fathoms. Family Lumbrineridae

Genus Lumhrineris Blainville, 1828

Lumbrineris fragilis (Miiller, 1776)

Lumhrineris fragilis Moore, 1909b, p. 138.— Pettibone, 1954. p. 275, fig. 31,h-n. Lumhrineris hehes Moore, 1909b, p. 138; not L. hebes Verrill, 1879. Lumhrinereis fragilis Treadwell, 1937, p. 31. Lumbriconereis fragilis Wesenberg-Lund, 1953, p. 51.

New records: Labrador: Hebron Fjord, Hamilton Inlet, St. Lewis Inlet, 5-13 fms., on various combinations of mud, sand, sand- POLYCHAETE WORMS—PETTIBONE 561 stone, pebbles, rocks, shells, much detritus; 6 specimens. Stations 18, 23, 45. Distribution: Widely distributed in the Arctic. Also Iceland, Faroes, Norway to Azores and Mediterranean; Hudson Bay to Rhode Island; Bering Sea; north Japan Sea. In low water to 1,883 fathoms.

Family Spionidae

Both genera represented have setiger 5 not modified, prostomium without frontal horns, with more than one pair of branchiae beginning on setiger 2, and with anal cirri.

Key to the genera of Spionidae from Labrador

1. Branchiae present on only few anterior segments, 3-11 pairs, often pinnate. With hooded crotchets in both noto- and neuropodia Prionospio Branchiae more than 11 pairs, not pinnate. Without hooded crotchets in notopodia of posterior segments Laonice

Genus Prionospio Malmgren, 1867

Prionospio malmgreni ClaparMe, 1868

Prionospio malmgreni Pettibone, 1954, p. 282, fig. 32,i-k. New records: Labrador: Hebron Fjord, St. Lewis Inlet, 40-100 fms., mud; 2 specimens, Stations 5, 74. Distribution: Arctic Alaska to Washington; north Japan Sea; Iceland, Norway to Mediterranean; Labrador to Massachusetts; South Africa. In low water to 250 fathoms; surface.

Genus Laonice Malmgren, 1867

Laonice cirrata (Sars, 1851)

Nerine cirrata Sars, 1851, p. 207. Scolecolepis cirrata Malmgren, 1867, p. 91, pi. 9, fig. 54. Scololepis cirrata Verrill, 1881, pp. 298, 301, 304, 309, 312, 316. Spionides foliata Moore, 1923, p. 182. Spionides sacculata Moore, 1923, p. 184. Laonice cirrata Fauvel, 1927, p. 38, fig. 12,a-e.—Annenkova, 1937, p. 169; 1938, p. 172.—Gorbunov, 1946, p. 38.—Zatsepin, 1948, p. 132, pi. 32, fig. 12.— Hartman, 1948, p. 36.—Hartman and Reish, 1950, p. 28.— Wesenberg-Lund, 1950a, p. 30; 1950b, p. 75; 1951, p. 68, fig. 6; 1953, p. 56. Berkeley and Berkeley, 1952, p. 26, figs. 49-51. Description: Prostomium enlarged and rounded anteriorly, with two eyes and an occipital antenna, with a dorsal crest extending back about 30 segments. Branchiae cirriform, well separated from the —

562 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los dorsal lamellae, folded back on dorsum, present on anterior 28-60 segments. With genital or interramal pouches in which eggs may be present, formed by union of ventral lamellae, beginning on segments 25-50. Anus encircled by 8-14 cirri. New records: Labrador: Hamilton Inlet, 30 fms., mud, stones; 1 specimen, Station 43. West Coast North America: Washington and Puget Sounds, Washington, 10-165 fms., on bottoms of mud, rocks, mud with sand and kelp, M. H. Pettibone. East Coast North America: Off Maine, Alassachusetts, 22-68 fms., U. S. Fish Commission (by Verrill as Scolecolepis cirrata). Distribution: Widely distributed in the Arctic: Davis Strait, Greenland, Spitsbergen, Novaya Zemlya, Kara Sea, Siberian Arctic. Also Iceland, Faroes, Norway to English Channel and Mediterranean; Labrador to Massachusetts; Alaska to southern California; north Japan Sea to Japan. In 5 to 891 fathoms.

Family Cirratulidae

Genus Ciriatulus Lamark, 1801

Cirratiihis cirratus (Miiller, 1776)

Cirratulus cirratus Moore, 1909b, p. 139.— Wesenberg-Lund, 1953, p. 61. Pettibone, 1954, p. 286, fig. 33,a-c.

New record: Labrador: Hebron Fjord, 95 fms., mud; 1 specimen. Station 11. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to France, Canary Islands; Hudson Bay to Massachusetts; Bering Sea to Mexico; north Japan Sea to Japan, Manchuria; Falkland Islands, Magellan Straits, South Georgia, Kerguelen. In low water to 1,611 fathoms.

Genus Chaetozone Malmgren, 1867

Ciuietozone setosa Malmgren, 1867

Chaetozone setosa Moore, 1909b, p. 139.—Wesenberg-Lund, 1953, p. 61.—Petti- bone, 1954, p. 287, fig. 33,d.

New records: Labrador: Hebron Fjord, 95-125 fms., mud, in empty tubes of Pectinaria filled with soft mud; 46 specimens. Stations 11, 12. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to Canary Islands, Alediterranean, Adriatic, Gulf of Aden; Labrador to Massachusetts; Bering Sea to British Columbia; north Japan Sea; Falkland Islands, Magellan Straits, Kerguelen. In low water to 1,333 fathoms; surface. POLYCHAETE WORMS—PETTIBONE 563

Family Flabelligeridae (Chloraemidae)

Key to the genera of Flabelligeridae from Labrador

1. Body covered with a thick mucous mantle containing long pedunculate papillae. Neurosetae stout compound hooks, 1-2 per lobe. Setae of the first setiger numerous, long, directed anteriorly forming a cephalic cage enclosing the branchiae, etc Flabelligera Body without mucous mantle. Neurosetae simple or pseudocompound. Body covered with short to long papillae (rarely rugose only), papillae not pedunculate 2 2. Setae of first setigers longer than the following, directed anteriorly forming a distinct cephalic cage Pherusa Setae of first setigers not forming a distinct cephalic cage Brada

Genus Flabelligera Sars, 1829

Flabelligera affinis Sars, 1829

Flabelligera affinus Moore, 1909b, p. 143. Flabelligera affinis Pettibone, 1954, p. 289, fig. 33, e-g.

New records: Labrador: Seven Islands Bay, Okak area, Davis Inlet, 10-30 fms., on bottoms of rubble and mud with rocks and stones; 5 specimens, Stations 20, 30, 31, 77. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to France, Mediterranean; Hudson Bay to Massachusetts; Bering Sea to southern California; north Japan Sea; Falkland Islands, Magellan Straits, South Georgia, South Africa, Australia. In low water to 889 fathoms; surface.

Genus Pherusa Oken, 1807

Pherusa plu mosa (Miiller, 1776)

Amphitrite plumosa Miiller, 1776, p. 216. Siphonostomum asperum Stimpson, 1854, p. 31. Trophonia plumosa Malmgren, 1867, p. 82.— Verrill, 1881, pp. 293, 294, 295, 299.— Webster and Benedict, 1887, p. 729. Trophonia aspera Verrill, 1881, pp. 289, 295, 298, 304, 308, 312, 314.—Webster and Benedict, 1887, p. 730.— Moore, 1909b, p. 143. Trophonia papillata Johnson, 1901, p. 416, pi. 12, figs. 122-123. Stylarioides plumosa Eliason, 1920, p. 61.— Fauvel, 1927, p. 116, fig. 41,a-g; 1933, p. 48.—Okuda, 1937, p. 52, pi. 2, fig. c—Annenkova, 1937, p. 175; 1938, p. 184.—Hartman, 1944c, p. 22.—Gorbunov, 1946, p. 39.—Zatsepin, 1948, p. 135, pi. 33, fig. 2.—Wesenberg-Lund, 1949, p. 334; 1950a, p. 35; 1950b, p. 83; 1951, p. 77; 1953, p. 65.—Berkeley and Berkeley, 1952, p. 9, fig. 7. Stylarioides papillata Moore, 1923, p. 221.—Hartman, 1948, p. 40.—Hartman and Reish, 1950, p. 35.—Berkeley and Berkeley, 1952, p. 8. Pherusa plumosa St0p-Bowitz, 1948a, p. 13, fig. 2; 1948b. p. 33. Description: Body round, slightly flattened ventrally, inflated and abruptly attenuated posteriorly, up to 70 segments. Body covered 564 PROCEEDINGS OF THE NATIONAL MUSEUM vol.106 with elongated, cylindrical or capitate papillae agglutinated with mud and sand. Noto- and neurosetae on first three setigers capillary, ringed, iridescent, longer than the following, directed forward forming a cephalic cage. Neurosetae, beginning on setiger 4, hooked sigmoid crotchets of variable form; notosetae capillary. New records: Labrador: Hebron Fjord, Strait of Belle Isle, 8-13 fms., soft mud, and sand with rocks, pebbles; 5 specimens. Stations 17, 18. East Coast North America: Off Nova Scotia, Maine, Massachusetts, 18-96 fms., U. S. Fish Commission (by Verrill as Trophonia aspera). Canadian Arctic: Kneeland Bay in Fro- bischer Bay, Baffin Island, 17 fms., 1942, K. A. Bartlett. North- west Greenland: 1 mile northwest of Conical Rock, 25-60 fms., 1940, R. A. Bartlett. West Coast North America: Albatross Station 2845, Alaska Peninsula, 54°05' N., 164°09' W., 42 fms., 1888; Strait of Juan de Fuca, Washington and Puget Sounds, Wash- ington, low water to 105 fms., M. H. Pettibone. Distribution: Widely distributed in the Arctic: Siberian and Canadian Arctic, Greenland, Spitsbergen, Barents Sea, Novaya Zemlya, Kara Sea. Also Iceland, Faroes, Norway to France, Adriatic, Iranian Gulf; Labrador to Massachusetts; West Indies, Venezuela; Alaska to Columbia; Okhotsk Sea to Japan, China. In low water to 1,611 fathoms.

Genus Brada Stimpson, 1854

Key to the species of Brada from Labrador

1. Notosetae well developed. Body covered with elongated cylindrical papillae encrusted with sand. Long fusiform papillae around the setai bundles B. villosa Notosetae poorly developed, few or absent 2 2. Papillae very small, globular or cup-shaped, covered with thin layer of sand B. inhabilis Papillae scattered, elongated, conical or cylindrical with small tip, covered by entire la3'er of sand (necessary to remove sand to see shape of papillae) B. granosa Brada villosa (Rathke, 1843)

Brada villosa Wesenberg-Lund, 1953, p. 67.—Pettibone, 1954, p. 290. New record: Labrador: Backway, Greater Lake Melville area,

15-16 fms.; 1 specimen, Station 67. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to Spain, Mediterranean, Adriatic, south Arabian coast; Hudson Bay to Rhode Island; Bering Sea to southern California; north Japan Sea to Japan; South Orkney and South Shetland Islands. In low water to 853 fathoms. POLYCHAETE WORMS—PETTIBONE 565

Brada inhabilis (Rathke, 1843)

Brada inhabilis Wesenberg-Lund 1953, p. 67.—Pettibone, 1954, p. 292, fig. 33,h.

New record: Labrador: Hebron Fjord, 95 fms., mud; 1 specimen, Station 11. Distribution: Widely distributed in the Arctic. Also Iceland, Norwa}^ to Danish waters; Labrador to Maine; Bering Sea to Gulf of Alaska; north Japan Sea. In low water to 609 fathoms. Brada granosa Stimpson, 1854

Brada granosa Stimpson, 1854, p. 32, pi. 2, fig. 22.—Verrill, 1881, pp. 289, 308.— Webster and Benedict, 1887, p. 732, pi. 5, figs. 72-76.—Not Treadwell, 1937,

p. 32 ( = S. inhabilis). Brada granulosa Hansen, 1882, p. 39, pi. 7, figs. 21-22.—St0p-Bowitz, 1948a, p. 47, fig. 13; 1948b, p. 46, fig. 18.—Wesenberg-Lund, 1951, p. 80. Brada granulata Moore, 1909b, p. 143; not B. granulata Malmgren, 1867. Brada inhabilis Annenkova, 1937, p. 176; 1938, p. 185.—Gorbunov, 1946, p. 39.—Zatsepin, 1948, p. 136; not Siphonostoma inhabilis Rathke, 1843. New records: Labrador: Hebron Fjord, 95 fms., mud; 13 specimens, Station 11. East Coast North America: Bay of Fundy, off Maine, Massachusetts, 18 to 253 fms., U. S. Fish Commission (identified by Verrill). West Coast North America: Iliuliuk Harbor, Unalaska, 1871, and New Harbor, Unga Island, 1872, W. H. Dall. Distribution: Scattered records in the Arctic: Siberian Arctic, Spitsbergen. Also Iceland, Norway; Labrador to Massachusetts; southwestern Alaska; north Japan Sea. In 3 to 253 fathoms. Family Scalibregmidae

Key to the genera of Scalibregmidae from Labrador and Nova Scotia

1. Body inflated anteriorly, abruptly attenuated on posterior half. Prostomium T-shaped, with frontal horns. Posterior parapodia with digitiform dorsal and ventral cirri (begin on se tigers 16-18). Annuli 4 per segment. Py- gidium with 4-5 filiform anal cirri Scalibrcgma Body short, fusiform. Prostomium bilobed, without frontal horns. Para- podia without dorsal and ventral cirri. Annuli 2 per segment. Pygidium without anal cirri Polyphysia Genus Scalibregma Rathke, 1843

Scalibregma inflatum Rathke, 1843

Scalibregma inflafum not Moore, 1909b, p. 143 (= Polyphysia crassa).—Wesen- berg-Lund, 1953, p. 68.—Pettibone, 1954, p. 293, fig. 33,i-k. New records: Labrador: Middle and west end Lake Melville, 17-35 fms., on bottoms of mud; 3 specimens, Stations 28, 55. . .

566 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loe

Distribution: Widely distributed in the Arctic. Also Iceland, Norway to France, Adriatic, Gulf of Oman; Labrador to Long Island Sound; Bering Sea to central California; north Japan Sea to Japan; New Zealand, Magellan Straits, South Georgia, Prince Ed- ward Islands, Kerguelen. In low water to 1,333 fathoms; epitokes at surface. Genus Polyphysia Quatrefages, 1865

Polyphysia crassa (Oersted, 1843)

Eumenia crassa Venill, 1881, pp. 298, 304, 311.—Fauvel, 1927, p. 127, fig. 45,i-k.— Zatsepin, 1948, p. 136, pi. 33, fig. 9.— Wesenberg-Lund, 19o0a, p. 37; 1950b, p. 88; 1951, p. 81; 1953, p. 71.

Scalibregma inflalum Moore, 1909b, p. 143; not (S'. inflatum Rathke, 1843. Polyphysia crassa St0p-Bowitz, 1946a, p. 75, figs. 4-6; 1948b, p. 29, fig. 10.

Description: Branchiae 4 pairs (or 6?), arborescent, on setigers 2-5, first ones smaller, last ones larger (young without branchiae or small single lobes) New records: East Coast North America: Off Nova Scotia, Maine, Massachusetts, 56-110 fms., U. S. Fish Commission (identified by Verrill) Distribution: AVidely distributed in the Arctic: Siberian Arctic, Greenland, Spitsbergen, Novaya Zemlya, Kara Sea. Also Iceland, Norway to England, Mediterranean; Gulf of St. Lawrence to Massa- chusetts. In 47 to 1,254 fathoms.

Family Opheliidae

Key to the genera of Opheliidae from Labrador

1. Body rounded, cylindrical, grub-shaped, without ventral groove. Pygidium small, cylindrical, longitudinally furrowed. With paired lateral cirriform branchiae Travisia Body rounded anteriorly on anterior half or third, with a deep ventral and two lateral grooves on posterior part. Pygidium with papillae—2 larger ventral ones and a dorsolateral circlet of smaller ones. With paired lateral straplike branchiae (except on first &-11 and few terminal segments). Ophelia Genus Iravisia Johnston, 1840

Travisia forbesii Johnslon, 1840

Travisia forbesii Malmgren, 1867, p. 75.—Not Murdoch, 1885, p. 154 {—Travisia camea) .—Chamberlin, 1920, p. 20.—Fauvel, 1927, p. 138, fig. 48,g-k.— Annenkova, 1938, p. 188.—Berkeley and Berkeley, 1942, p. 198.—St0p- Bowitz, 1946b, p. 26, fig. 1; 1948b, p. 10, fig. 2.—Zatsepin, 1948, p. 137, pi. 33, fig. 6.—Wesenberg-Lund, 1950a, p. 38; 1950b, p. 90; 1951, p. 82; 1953, p. 71.

Description: Segments 23-26. With conspicuous lateral lobes on two fleshy eminences on each side of posterior 9-11 segments, up to last segment (only one posterior segment without). POLYCHAETE WORMS—PETTIBONE 567

New records: Labrador: Strait of Belle Isle, 15-20 fms., sand; 2 specimens, Station 15. West Coast North America: Washington Sound, low water, M. H. Pettibone; Chichagof Harbor, Attn Island, gravel and mud, 1873, and Cliiachi Islands, Alaska, 20 fms., mud, 1874, W. II. Dall; Karluk, Alaska, Alaska Salmon Investigation, 1903. Distribution: Widely distributed in the Arctic: Siberian, Alaskan, and Canadian Arctic, Davis Strait, Greenland, Jan Mayen, Spits- bergen, Novaya Zemlya, Kara Sea. Also Iceland, Faroes, Norway to France; Labrador to Maine; Soutli Africa; Bering Sea to Wash- ington Sound; north Japan Sea. In low water to 1,501 fathoms.

Genus Ophelia Savigny, 1822

Ophelia Umacina (Kathke, 1843)

Ammotrypajie Umacina Rathke, 184:3, pp. 190, 202, pi. 10, figs. 4-8. Ophelia Umacina Verrill, 1881, pp. 289, 316, 319.—Not Webster and Benedict, 1884, p. 724 (-=0. hicor7iis).—Fauvel, 1927, p. 132, fig. 46,i-l.—Treadwell, 1937, p. 32.—Annenkova, 1937, p. 177; 1938, p. 187.—Hartman, 1938, p. 107, figs. 55-58; not 1942b, p. 130 (==0. denticulata).— Berkeley and Berkeley, 1943, p. 130.—St0p-Bowitz, 1946b, p. 32, fig. 2; 1948b, p. 12, fig. 3.—Zatsepin, 1948, p. 137, pi. 33, fig. 5.—Wesenberg-Lund, 1950a, p. 37; 1950b, p. 88; 1951, p. 83.—Tebble, 1952, p. 561, fig. 4; 1953, pp. 362, 365. OpheUa boreaUs Tebble, 1952, p. 553, figs. 1-3; 1953, pp. 362, 365.—Berkeley and Berkeley, 1954, p. 467. Ophelia assimilis Tebble, 1953, p. 367. Description: The two specimens from Labrador are 29-33 mm. long, 3.5-4 mm. wide, consisting of 33 setigerous segments: 10 prebranchial, 16 branchial, and 7 postbranchial. Ventral groove begins on setiger 7. The dorsolateral circlet of anal papillae are rather long, the setae of the posterior segments are long, extending well beyond tlie posterior end of the bod}". The paired dorsolateral longitudinal ridges on the posterior five segments (setigers 29-33) are prominent. Remarks: Tebble (1952) has attempted to distinguish between Ophelia horcalis Quatrefages (10 prebranchial setigers, typically 20 (16-20) branchial setigers, 6 (6-10) postbranchial setigers, 36 (34-36) total number of setigers, with dorsolateral circlet of anal papillae long and thin, and with setae of posterior segments long, concealing the anal segment) and 0. Umacina (10 prebranchial setigers, typically 22 (18-23) branchial setigers, 7 (6-10) postbranchial setigers, 39 (38-39) total number of setigers, with dorsolateral circlet of anal papillae short and blunt, and setae of posterior segments short). In the material examined b}^ Tebble, the two groups could be separated and there were no intergradations. However in the material examined in the U. S. National Museum from Greenland, Canadian Arctic, Arctic Alaska, Labrador, Washington, Oregon, and central California there were all gradations from the typical 0. —

568 PROCEEDINGS OF THE NATIONAL MUSEUM limacina to the typical 0. horealis, as defined by Tebble, in the number of branchial, postbranchial, and total number of segments. The specimens from Labrador (16 branchial, 7 postbranchial, and 33 total setigers) and 0. assimilis Tebble, 1953, from central California (19 branchial, 4 postbranchial, and 33 total setigers) appear to fall in place in the variable series. The dorsolateral anal papillae vary from short, rounded to longer, digitiform depending on the degree of contraction (indicated also by Hartman, 1938d, p. 107).

Table 3. Summary of observations on Ophelia limacina (Rathke)

Pre- Post- Bran- Total bran- bran- chial number Dorsolateral chial chial Geographic location setiger- setiger- circlet anal Anal setae setiger- setiger- ous seg- ous seg- papillae ous seg- ous segments ments ments ments

Canadian Arctic 24 40 Short to rather Short to long. long. Greenland 22 7 39 Short Short. Central California 23 6 39 Long Long. Typical O. limacina accord- 22 7 39 Short, blunt Short. ing to Tebble, 1952. (18-23) (6-10) (38-39) Canadian Arctic 22 6 38 Short Short. Arctic Alaska, Washington. 21 6 37 Long... Long. Oregon 20 6 36 Medium long... Short to long. Typical O. horealis accord- 20 6 36 Long, thin Long. ing to Tebble, 1952, Brit- (16-20) (6-10) (34-36) ish waters, Atlantic. Labrador 16 7 33 Long Long. O. assimilis Central Cali- 19 4 33 Short (?). fornia. Range for material examined 16-24 C-7 33-40 Short to long... Short to long. Range for O. limacina (incl. 16-24 4-7 33-40 Short to long Short to long. O. borealis, 0. assimilis).

The setae of the posterior segments may be short (broken off?) to long. The observations are summarized in table 3. Thus I could not follow Tebble in considering 0. horealis and 0. assimilis valid species. The range for the material examined is 10 prebranchial, 16-24 branchial, 6-7 postbranchial, and 33-40 total setigers, with the dorsolateral anal papillae and setae of posterior segments short to long. Ophelia denticulata Verrill, 1875 (type in USNM) should not be referred to 0. limacina (Hartman, 1942b, p. 130). They may be distinguished as follows: in 0. denticulata the deep ventral groove begins on setigers 9-10, in 0. limacina it begins on setiger 7; in 0. denticulata there are 9 prebranchial setigers instead of 10 as in 0. limacina; in 0. denticulata paired dorsal longitudinal ridges on posterior few segments are absent, present in 0. limacina. New records: Labrador: Strait of Belle Isle, 15-20 fms., sand; 2 specimens. Station 15. West Greenland: Off Conical Rock, 20^0 fms., 1938; 1 mile northwest of Conical Rock, 1940; west side POLYCHAETE WORMS—PETTIBONE 569

Wolstemholm Island, 1940—all by R. A. Bartlett; Upernivik Harbor, 13 fms., 1884, U. S. S. Alert. West Coast North America: Chicha- gof Harbor, Attu Island, 5-7 fms., gravel and sand, 1873, W. H. Dall; Albatross Station 2879, off Washington, 48°53' N., 125°53' W., 34 fms., 1888; 5 miles off Moclips, Wash., 20 fms., 1940, and 7 miles south Cape Arago, Oreg., 32-35 fms., shale and coral, 1939, M. H. Pettibone; Albatross Station 4453, Monterey Bay, Calif., 49 fms., 1904. Distribution: Widely distributed in the Arctic: Siberian, Alaskan and Canadian Arctic, Davis Strait, Greenland, Spitsbergen, Barents Sea, Novaya Zcmlj^a, Kara Sea. Also Iceland, Faroes, Norway to English Channel; Hudson Bay to Grand Manan; Alaska to southern California; north Japan Sea to Japan. In low water to 250 fathoms.

Family Capitellidae

Genus Capitella Blainville, 1828

Capitella capitata {Fabricius, 1780)

Capitella capitata Wesenberg-Lund, 1953, p. 74.—Berkeley and Berkeley, 1954, p. 465.— Pettibone, 1954, p. 298, fig. 33,r-u.

New record: Labrador: Hamilton Inlet, 6 fms., muddy, sandy; 4 specimens, Station 24. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to France, Mediterranean, Black Sea; Hudson Bay to North Carolina, Texas; Bering Sea to southern California; north Japan Sea; Magellan Straits, South Georgia, Bouvet Island, South Africa, Kerguelen. In low water to 500 fathoms.

Family Maldanidae

Genus Praxillella Verrill, 1881

Praxillella praetermissa (Malmgren, 1865)

Praorillella praetermissa Moore, 1909b, p. 142.—Wesenberg-Lund, 1953, p. 82.— Pettibone, 1954, p. 303, fig. 34,b-f.

New records: Labrador: Okak area, Hamilton Inlet, Strait of Belle Isle, 5-8 fms., on bottoms of mud, sand, mud and rock with much detritus; 6 specimens. Stations 17, 23, 73. Distribution: Widely distributed in the Arctic. Also Iceland, Faroes to English Channel, Mediterranean; Labrador to Massachu- setts; north Japan Sea. In 7 to 1,111 fathoms.

Genus Maldane Grube, 1860

Maldane sarsi JMalmgren, 1863

Maldane sarsi Moore, 1909b, p. 142.—Wesenberg-Lund, 1953, p. 84.—Pettibone, 1954, p. 303, fig. 34,g,h. 570 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i06

New record: Labrador: Seven Islands Bay, 30 fms., mud with rock; 2 specimens, Station 31. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to France; Labrador to Rhode Island, Louisiana, Mississippi, Texas; Bering Sea to southern California; north Japan Sea to Japan; south Arabian coast, Bay of Bengal, South Georgia, South vShetlands, Palmer Archipelago, south Australia. In low water to 1,771 fathoms.

Genus ISicomache IMalnigren, 1865

Nicomache lumbricalis (Fabricius, 1780)

Nicomache lumbricalis Wesenberg-Lund, 1953, p. 79.— Pettibone, 1954, p. 305, fig. 34,i,j.

New records: Labrador: Seven Islands Bay, Hebron Fjord, west end Lake Melville, 30-125 fms., mud, and mud with rock; 9 specimens, Stations 12, 14, 31, 37, 57. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to English Channel, Santander; Labrador to Massachusetts; South Africa; Bering Sea to Lower California; north Japan Sea. In low w^ater to 1,400 fathoms.

Family Pectinariidae (Amphictenidae)

Genus Pectinaria Lamark, 1818

Subgenus Cistenides IMalnigren, 1865

Pectinaria (^Cistenides) hyperborea (Malmgren, 1865)

Cistenides hyperborea Weaenberg-Lund, 1953, p. 89. Pectinaria (Cistenides) hyperborea Moore, 1909b, p. 140.— Pettibone, 1954, p. 314, fig. 35,c-h.

New records: Labrador: Seven Islands Ba}', Hebron Fjord, Nain area, Hamilton Inlet, St. Lewis Inlet, Strait of Belle Isle, 8-125 fms., on bottoms of mud, sand, stones, and various combinations of

mud, stones, rocks, shells; 304 specimens, Stations 5, 10-14, 17, 27, 31, 33, 41, 45, 49, 50, 56, 74. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to Danish waters. North Sea; Labrador to Massachusetts; Bering Sea to Alaska; north Japan Sea to Japan. In 1.5 to 379 fathoms.

Pectitiuria (Cistenides) granulata (Linne, 1767)

Cistenides granulata Wesenberg-Lund, 1953, p. 88. Pectinaria (Cistenides) granulata Pettibone, 1954, p. 312, fig. 35,i-k.

New records: Labrador: Davis Inlet, Ironbound Islands, Hamil- ton Inlet, west end Lake Melville, 4-12 fms., on bottoms of mud. POLYCHAETE WORMS—PETTIBONE 571 sandy mud, mud with rock, rubble; 10 specimens, Stations 20, 47, 48, 52, 69. Distribution: Widely distributed in the Arctic. Also Iceland, Faroes to Great Britain; Labrador to Long Island Sound; Bering Sea to western Mexico; north Japan Sea. In low water to 190 fathoms.

Family Ampharetidae

Key to the genera of Ampharetidae from Labrador

1. With a pair of large, recurved, dorsal hooked setae behind the branchiae. Branchiae 8. Without paleae. Thoracic setigers 16 (first 2 may be small). Melinna Without pair of dorsal hooked setae posterior to branchiae 2 2. With well developed bundles of golden setae (paleae) on each side, anterior to branchiae. Branchiae 8. Thoracic setigers 14. Uncinigerous pinnules begin on setiger 3 Ampharete Without paleae or paleae poorly developed (smaller and more delicate than notosetae, easily overlooked) 3 3. Uncinigerous pinnules begin on setiger 3. Branchiae 8. Thoracic setigers 13. Paleae very reduced or absent Sabellides Uncinigerous pinnules begin on setiger 4 4 4. Branchiae 8. Without paleae or paleae very small and delicate. Thoracic setigers 16 (first small, easily overlooked) Lysippe Branchiae 6. Without paleae. Thoracic setigers 17 (first very small, easily overlooked) Samytha

Genus Melinna Malmgren, 1865

Melinna cristata (Sars, 1851)

Sahellides cristata Sars, 1851, p. 205. Melinna cristata Malmgren, 1865, p. 371, pi. 20, fig. 50.— Verrill, 1881, pp. 298, 302, 305, 309, 312.—Webster and Benedict, 1884, p. 732; 1887, p. 748.— Moore, 1908, p. 349.— Fauvel, 1927, p. 237, fig. 83,i-n; 1933, p. 53.—Annen- kova, 1937, p. 186; 1938, p. 199.—Zatsepin, 1948, p. 149, pi. 37, fig. 6.— Hartman and Reish, 1950, p. 42.—Wesenberg-Lund, 1950a, p. 49; 1950b, p. 114; 1951, p. 105; 1953, p. 93.—Berkeley and Berkeley, 1952, p. 70, figs. 143-145. Melinna cristata heterodonta Moore, 1923, p. 212, pi. 17, fig. 25.

Description: Branchiae 8, united by a palmar membrane of variable height. Anterior few segments coalesced, forming a collarette ventrally, with sides elevated in a lateral crest, and with a transverse dorsal fimbriated thoracic membrane (10-20 teeth). Abdominal region long, tapered posteriorly, about 50 segments. Pygidium without cirri. Tube of mud with few small pebbles. New records: Labrador: Hamilton Inlet, 5-6 fms., sand, mud, rock, much detritus; 1 specimen, Station 23. East Coast North America: Off Nova Scotia, Maine, Massachusetts, 6-374 fms., U. S. Fish Commission (identified by Verrill). 572 PROCEEDINGS OF THE NATIONAL ]MUSEUM vol. 105

Distribution: Widely distributed in the Arctic: Siberian Arctic, Greenland, Jan Mayen, Spitsbergen, Barents Sea, Novaya Zemlya, Kara Sea. Also Iceland, Faroes, Scandinavia to France; Hudson Bay to Massachusetts; Alaska to southern California; north Japan Sea, Manchuria; Antarctic. In 4 to 2,228 fathoms.

Genus Ampharete INIalmgren, 1865

Key to the species of Ampharete from Labrador

1. Paleae slender, taper gradually. Anal cirri numerous. Tube membranous plus soft gray debris A. acutifrons Paleae stouter, taper rather abruptly, with short to long acuminate tips.

Anal cirri 2. Tube of stiflf, smooth, compact mud A. arctica

Ampharete acutifrons (Grube, 1860)

Ampharete acutifrons Wesenberg-Lund, 1953, p. 90—Pettibone, 1954, p. 316, fig. 36,b-d.

New record: Labrador: Strait of Belle Isle, 8 fms,, soft mud; 1 specimen, Station 17.

Distribution: Widely distributed in the Arctic. Also Iceland, Swedish west coast to France, Mediterranean; Labrador to Maine;

Bering Sea to southern California; north Japan Sea. In 1 to 1,333 fathoms. Ampharete arctica Malmgren, 1865

Ampharete arctica Malmgren, 1865, p. 364, pi. 26, fig. 77.— Verrill, 1881, p. 312,— Moore, 1908, p. 348; 1923, p. 200.—Hessle, 1917, p. 97, fig. 9.—Augener, 1928, p. 777.— Gustafson, 1936, p. 9.—Annenkova, 1937, p. 188; 1938, p. 201.—Gorbunov, 1946, p. 39.—Zatsepin, 1948, p. 150, pi. 37, fig. 11.— Berkeley and Berkeley, 1952, p. 65, figs. 133-135. Ampharete setosa Verrill, 1873, pp. 612, 416.—Hartman, 1944a, p. 20 (52), fig. 8 (figure as A. grubei). Ampharete gracilis Verrill, 1881, pp. 302, 305, 309, 312.—Moore, 1923, p. 20; not A. gracilis Malmgren, 1865. Ampharete finmarchica Verrill, 1881, pp. 298, 305, 309, 312.—Wesenberg-Lund, 1950a, p. 47; 1950b, p. 109; 1953, p. 90. Ampharete groenlandica Treadwell, 1937, p. 33.

Description: Paleae about 20 in each semicircular group, taper rather abruptly, with short to long acuminate tips. Abdominal setigers 13 (may be 12). Neuropodial cirri inconspicuous. New records: Labrador: Hebron Fjord, 60-65 fms., fine sand, mud, some rock; 1 specimen. Station 10. East Coast North America: Off Maine, Massachusetts, 13-110 fms., U. S. Fish Commis- sion (by Verrill as A. gracilis, A. setosa, A. finmarchica). West Coast North America: Washington Sound, 12 fms., mud, M. H. Pettibone. Distribution: Widely distributed in the Arctic: Siberian and Canadian Arctic, Greenland, Spitsbergen, Barents Sea, Novaya —

POLYCHAETE WORMS—PETTIBONE 573

Zemlya, Kara Sea. Also Shetlands, Norwaj^ to Danish waters and Scotland; Hudson Bay to Massachusetts; Bering Sea to southern California; north Japan Sea to Japan. In 2 to 1,062 fathoms.

Genus Lysippe Malmgren, 1865

Lysippe labiata Malmgren, 1865

Lysippe labiata Malmgren, 1865, p. 367, pi. 26, fig. 78.—Annenkova, 1937, p. 189; 1938, p. 201.— Gorbunov, 1946, p. 39.—Zatsepin, 1948, p. 151, pi. 37, fig. 17.—Wesenberg-Lund, 1950a, p. 48; 1950b, p. 113; 1951, p. 105; 1953, p. 93.—Berkeley and Berkeley, 1952, p. 67, fig. 138.

Description: Peristomium forms a widely protruding collarlike lobe. Abdominal segments 14 (13-15?). Two short anal chri. Without paleae (or very small and delicate).

New records: Labrador: Hamilton Inlet, Strait of Belle Isle, 8-30 fms., soft mud and mud with stones; 2 specimens, Stations 17, 43. East Coast North America: Bedford Basin, Nova Scotia, 40 fms., U. S. Fish Commission (by Verrill). Distribution: Widely distributed in the Arctic: Siberian Arctic, Greenland, Spitsbergen, Barents Sea, Novaya Zemlya. Also Iceland, Denmark; Labrador to Nova Scotia; Alaska; north Japan Sea. In 1 to 433 fathoms.

Genus Samytha Malmgren, 1865

Sainytha sexcirrata (Sars, 1856)

Samytha sexcirrata Malmgren, 1865, p. 370, pi. 20, fig. 49.—Verrill, 1881, pp. 298 305, 309, 312.— Moore, 1909b, p. 140; not 1923, p. 214.—Chamberlin, 1920, p. 23.—Berkeley and Berkeley, 1944, p. 3.—Zatsepin, 1948, p. 151, pi. 37, fig. 19.

Description: Branchiae 6, in transverse row from a common base. Abdominal segments 13. With an anterior ventral collar below the prostomium. New records: Labrador: Strait of Belle Isle, 8 fms., soft mud; 3 specimens. Stations 17. East Coast North America: Off Georges Bank, 110 fms., U. S. Fish Commission (by Verrill). Distribution: Siberian and Alaskan Arctic; Norway; Labrador to Gulf of Maine; Alaska. In 8 to 110 fathoms.

Genus Sabellides JXIilne-Edwards, 1838, emend. Malmgren, 1865

Sabellides borealis Sars, 1856

Sabellides borealis Malmgren, 1865, p. 368, pi. 20. fig. 47.— Moore, 1909b, p. 139.—Gorbunov, 1946, p. 39.—Zatsepin, 1948, p. 151, pi. 37, fig. 15. Wesenberg-Lund, 1950a, p. 47; 1950b, p. Ill; 1951, p. 104; 1953, p. 92. 574 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los

Description: Paleae very small, rudimentarj'- (smaller than notosetae). Branchiae 8, in two groups. Oral tentacles pinnate. Abdominal segments 12, with nem-opodial cutI. Two anal cirri. Tube muddy, gray, compact, smooth. New records: Labrador: Seven Islands Bay, Hebron Fjord, 30-125 fms., on bottoms of mud, stones, and mud with rock; 12 specimens. Stations 11, 12, 31, 41. Distribution: Widely distributed in the Arctic: Siberian Arctic, Greenland, Spitsbergen, Barents Sea, Novaya Zemlya, Kara Sea. Also Iceland, Norway to England; Labrador. In 5 to 153 fathoms.

Family Terebellidae

Genus Pista Malmgren, 1865

Both species have a single pair of branchiae, with large main stem and branched dichotymously. Cephalic ridge with numerous ej^e- spots. Two pairs large lateral lobes on segments 1 and 3 (anterior and posterior to branchial segment).

Key to the species of Pista from Labrador

1. Thoracic setigers 15. Tube of muddy sand in form of 2^ to 3 windings in horizontal plane, flattened oval in cross section P. flexuosa Thoracic setigers 16. Tube cylindrical, membranous, with small pebbles of varying sizes, debris, bryozoans, parts of other worm tubes, algae, etc. P. maculata Pista flexuosa (GruLe, 1860)

Terebella flexuosa Grube, 1860, p. 102, pi. 5, fig. 2. Axione flexuosa Malmgren, 1865, p. 384, p. 24, fig. 68.— Moore, 1909b, p. 141. Pista flexuosa Hessle, 1917, p. 162.—Annenkova, 1937, p. 191; 1938, p. 205.— Treadwell, 1937, p. 162.—Zatsepin, 1948, p. 155, pi. 38, fig. 10.—Wesenberg- Lund, 1950a, p. 52; 1950b, p. 120; 1953, p. 98. Scione flexuosa Augener, 1928, p. 790.

Some specimens shared their curved tubes with the polynoid com- mensals, Ardeobia anticostiensis. New records: Labrador: Seven Islands Bay, Hebron Fjord, Nain, Hamilton Inlet, west end Lake Melville, 10-125 fms., on bottoms of mud and mud with stones and rock; 40 specimens, Stations 10-12, 33, 38, 43, 50, 52, 57. Distribution: Widely distributed in the Arctic: Siberian and Canadian Arctic, Greenland, Spitsbergen, Novaya Zemlya, White Sea, Kara Sea. Also Labrador to Newfoundland; Okhotsk Sea to north Japan Sea. In 4 to 211 fathoms.

Pista maculata (Dalyell, 1853)

Pista maculata Wesenberg-Lund, 1953, p. 97.—Pettibone, 1954, p. 323, fig. 36, k, 1. —

POLYCHAETE WORMS—PETTIBONE 575

New records: Labrador: Seven Islands Bay, Hebron Fjord, east and west ends Lake Melville, Goose Bay and Tcrrington Basin of Greater Lake Alelville area, 8-125 fms.; on bottoms of mud, and mud with rock; 121 specimens. Stations 11, 12, 14, 31, 38-40, 47, 53, 55, 57, 59, GO, 68. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to English Channel; Hudson Bay to Maine; Bering Sea. In

3 to 1, 528 fathoms.

Genus Leaena Malmgren, 1865

Leaena abranchiata Malmgren, 1865

Leaena abranchiata Wesenberg-Lund, 1953, p. 99.— Pettibone, 1954, p. 325, fig. 37, a, b.

Some specimens had tubes of mud with bits of rock and were fastened to tubes of the terebellid Pista maculata. New records: Labrador: Seven Islands Bay, west end Lake Melville, 15-55 fms., on bottoms of mud and mud with rock; 21 specimens. Stations 31, 37, 38, 57. Distribution: Widely distributed in the Ai'ctic. Also Iceland, Faroes, Norwa}^, Sweden, Finland; Hudson Bay to Labrador; southwestern Alaska; Okhotsk Sea to north Japan Sea; Antarctic, South Georgia. In 5 to 1,975 fathoms.

Genus Thelepus Leuckart, 1849

Thelepus cincinnatus (Fabricius, 1780)

Thelepus cincinnatus Moore, 1909b, p. 141.—Wesenberg-Lund, 1953, p. 100. Pettibone, 1954, p. 327, fig. 37,d.

New records: Labrador: Davis Inlet, Strait of Belle Isle, 12-30 fms., on bottoms of rock, rock and bryozoans, and rubble; 5 speci- ments. Stations 2, 3, 20. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to Portugal, Mediterranean, Adriatic; Labrador to Massa- chusetts; Bering Sea to Washington; Japan; Indian Ocean; Antarctic. In low water to 1,391 fathoms.

Genus Polycirrus Grube, 1851

Polycirrus medusa Grube, 1855

Poylcirrus medusa Wesenberg-Lund, 1953, p. 102.—Pettibone, 1954, p. 328, fig. 37,e,f.

New record: Labrador: Kaipokok Inlet, 45 fms., silt; 1 specimen. Station 7. —

576 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i05

Distribution: Widely distributed in the Arctic. Also Iceland, Swedish west coast to France, Mediterranean; Labrador to Maine; Bering Sea to Washington; Okhotsk Sea to north Japan Sea. In low water to 889 fathoms.

Genus Terebellides Sars, 1835

Terebellides stroemii Sars, 1835

Terebellides stroemii Moore, 1909b, p. 142.—Wesenberg-Lund, 1953, p. 105. Pettibone, 1954, p. 330, fig. 37,i-m.

New records: Labrador: Hebron Fjord, Hamilton Inlet, west end Lake Melville, Strait of Belle Isle, 5-65 fms., on bottoms of mud and sandy mud with rock and much detritus; 5 specimens, Stations 10, 17, 23, 38. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to Portugal, Mediterranean, Adriatic, Black Sea; Hudson Bay to Long Island Sound; Gulf of Mexico, West Indies; Bering Sea to southern California, Panamd,, Venezuela; north Japan Sea to Japan; Iranian Gulf; Indian Ocean; Antarctic. In low water to 1,611 fathoms. Family Sabellidae

Genus Sahella Linne, 1767

Sabella crassicornis Sars, 1851

Sahella crassicornis Pettibone, 1954, p. 334, fig. 38,a-i. Sabella fabricii Wesenberg-Lund, 1953, p. 106.

New record: Labrador: Hamilton Inlet, 5-6 fms., sand, mud, rock, much detritus; 1 specimen, Station 23. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to France, Mediterranean; Hudson Bay to Massachusetts; Bering Sea to California, Central America; north Japan Sea to Japan. In low water to 230 fathoms.

Genus Potamilla Malmgren, 1865

Potamilla neglecta (Sars, 1851)

Potamilla neglecta Wesenberg-Lund, 1953, p. 107.—Pettibone, 1954, p. 335, fig. 38,j-n,

New record: Labrador: Hebron Fjord, 125 fms., mud; 1 specimen. Station 12. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to France, Mediterranean, Adriatic, Cape Verde Islands; Labrador to Massachusetts; Bering Sea to California; north Japan Sea to Japan; Antarctic. In low water to 1,044 fathoms. POLYCHAETE WORMS—PETTIBONE 577

Genus Branchiomma Kblliker, 1858

Tori of thorax with a single row of avicular uncini, without hoehke setae. Branchial filaments with paired dorsal appendages (stylodes) on outer sides of branchial filaments.

Branchiomma infarcta (Krbyer, 1856)

Sabella infarcta Kroyer, 1856, p. 21. Dasychone infarcta Malmgren, 1865, p. 403, pi. 28, fig. 86.—Augener, 1928, p. 803, pi. 11, fig. 11.— Gustafson, 1936, p. 10.—Berkeley and Berkeley, 1943, p. 130; 1944, p. 5.—Gorbunov, 1946, p. 39.—Zatsepin, 1948, p. 160, pi. 39, fig. 1.— Wesenberg-Lund, 1950a, p. 57; 1950b, p. 130; 1951, p. 121; 1953, p. 107. Branchiomma infarcta Johansson, 1927, p. 157. Description: Collarette 4-lobed—2 ventral, 2 laterodorsal. Bran- chial filaments without eyespots, banded with pink. Tube membranous, free end covered with mud. New records: Labrador: Kaipokok Inlet, Backway, east end, middle, and west end Lake Melville, Goose Bay, 9-80 fms., on bottoms of silt, mud, and sand with mud and rock; 43 specimens, Sta- tions, 7, 28, 32, 35, 39, 40, 47, 59, 60, 63, 67, 79. Distribution: Widely distributed in the Arctic: Siberian and Canadian Arctic, Davis Strait, Greenland, Spitsbergen, Novaya Zemlya, Kara Sea. Also Iceland, Norway, Denmark Strait; Hudson Bay to Labrador; Bering Sea. In low water to 411 fathoms.

Genus Chone Kroyer, 1856

Chone dundri Malmgren, 1867

Chone duniri Wesenberg-Lund, 1953, p. 109.—Pettibone, 1954, p. 339, fig. 39,k,l.

New record: Labrador: Strait of BeUe Isle, 8 fms., 'soft mud; 2 specimens. Station 17. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to North Sea, Madeira, Mediterranean, Adriatic; Lab- rador; Florida; Peru. In 8 to 889 fathoms.

Genus Euchone Malmgren, 1865

Large ventral groovelike depression with flared sides on posterior segments. Collarette 2-lobed, with small midventral slit.

Key to the species of Euchone from Labrador

1. Collarette obliquely slanted, longer ventrally. Branchial filaments end in long slender tips. Abdominal region with 2 pairs small ventral shields per segment E. papillosa Collarette nearly straight. Branchial filaments end in short lirabate tips.

Abdominal region with one pair large ventral shields per segment . E. analis —

578 PROCEEDINGS OF THE NATIONAL MUSEUM vol, lOO

Euchone analis (Kroyer, 1856)

Euchone analis Wesenberg-Lund, 1953, p. 110.—Pettibone, 1954, p. 339, fig. 39,m,n. New record: Labrador: Seven Islands Bay, 30 fms., mud, some rock; 4 specimens, Station 31. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to Danish waters; Hudson Bay to Labrador; Bering Sea to British Columbia; north Japan Sea. In 2 to 389 fathoms.

Euchone papillosa (Sars, 1850)

Euchone papillosa Malmgren, 1865, p. 407, pi. 29, fig. 94.—Augener, 1928, p. 805.— Gustafson, 1936, p. 10.—Annenkova, 1937, p. 196; 1938, p. 215.— Gorbunov, 1946, p. 39.—Zatsepin, 1948, p. 163, pi. 39, fig. 11.— Wesenberg- Lund, 1950a, p. 59; 1950b, p. 132; 1951, p. 124; 1953, p. 111. Euchone tuberculosa Malmgren, 1865, p. 407, pi. 29, fig. 92.— Moore, 1909b, p. 145. Description: Collarette notched midventrally. Tube thin, elongated, of silty mud, smooth, tough. New records: Labrador: Hebron Fjord, 95-125 fms., mud; 14 specunens. Stations 11, 12. East Coast North America: Bay of Fundy, U. S. Fish Commission (by Verrill as E. tuberculosa). West Coast North America: Albatross Station 2848, Unalaska to Cook Island, 55°10' N., 160°18' W., 110 fms., 1888; Albatross Station 3311, Bering Sea, 53°59' N., 166°29' W., 85 fms., 1890. Distribution: Widely distributed in the Arctic: Siberian Arctic, Greenland, Spitsbergen, Novaya Zemlya, Kara Sea, Laptev Sea. Also Iceland, Norway to Danish waters; Labrador to Bay of Fundy; Bering Sea; north Japan Sea. In 2 to 1,611 fathoms.

Family Serpulidae

Genus Spirorbis Daudin, 1800

Spirorbis (Laeospira) granulatus (Linne, 1767)

Spirorbis (Laeospira) granulatus Wesenberg-Lund, 1952, p. 12; 1953, p. 117. Pettibone, 1954, p. 343, fig. 39, r-t. New records: Labrador: Seven Islands Bay, east end Lake Melville, 30-35 fms., on bottoms of mud and mud with rock, on brachiopod shell; 2 specimens, Stations 31, 34. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to France; Hudson Bay to North Carolina; Alaska to British Columbia; north Japan Sea. In low water to 239 fathoms. POLYCHAETE WORMS—PETTIBONE 579

Spirorbis (Dexiospira) spirillum (Linne, 1758)

Spirorbis (Dexiospira) spirillum Moore, 1909b, p. 145.—Wesenberg-Lund, 1952 p. 9; 1953, p. 116.— Pettibone, 1954, p. 344, fig. 39,u-x. New records: Labrador: Seven Islands Bay, Nain, Hamilton Inlet, Backway, Greater Lake Melville area, Strait of Belle Isle, 10-40 fms., on bottoms of stones, rocks, mud, on bryozoans, algae (spiny type and Laminaria), on sabellid worm tube; 52 specimens,

Stations 1, 30, 31, 52, 66, 67. Distribution: Widely distributed in the Arctic. Also Iceland, Norway to France; Hudson Bay to Long Island Sound, southern Texas; Bering Sea to Mexico; north Japan Sea to Japan. In low water to 305 fathoms. References

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V. 8. SOVERNM^NT PRINTING OFflCCl l»BS